Generators

CMP470 proposes introducing a commitment fee floor for all technologies that are oversubscribed relative to Clean Power 2030 capacity targets. The modification targets generation developers with high impact and transmission owners with medium impact. It is proceeding through urgent governance route to workgroup stage.

DESNZ and Ofgem propose mandatory baseline cyber security requirements for all 1,400+ Ofgem licensees through licence conditions, using Cyber Essentials certification as the starting point. The proposal also expands Network and Information Systems (NIS) Regulations to capture more distributed energy operators deemed critical to system stability. NESO will provide independent advice on which services and operators should fall under the enhanced NIS framework.

Ofgem sets out five options for redesigning transmission network charges to steer investment towards Strategic Spatial Energy Plan locations, ranging from tweaking existing TNUoS to auctioning connection capacity by zone. Charges would apply to new generators, demand, and storage. Responses by 26 May 2026, reforms targeted for 2029.

Government sets strategic framework for expanding interconnection beyond current 10.3GW operational capacity and 7.45GW under development, moving from market-led Cap and Floor regime to planned approach aligned with NESO's Strategic Spatial Energy Plan due autumn 2027. New delivery framework will identify optimal location, capacity and connecting countries for interconnectors and Offshore Hybrid Assets combining cables with wind farms.

Ofgem proposes strategic planning-led interconnector development where NESO identifies projects and government sets delivery and financing arrangements. The consultation closes 1 May 2026. This shifts from developer-led merchant models to centrally planned interconnection aligned with wider system needs.

DESNZ proposes a bill discount scheme offering households within 500 metres of new transmission infrastructure £250 annually for 10 years, funded by an obligation on all electricity suppliers who will pass costs to all customers via bills. The scheme covers new overhead lines and substations from 2027, with eligible households identified automatically via their MPAN, plus an opt-in route for those on commercial meters or off-grid. Administrative costs are socialised across all billpayers while benefits flow only to those hosting infrastructure.

Government introduces regulations requiring majority of new homes in England to have solar panels fitted as standard from 2028 under the Future Homes Standard, removes regulatory barriers for plug-in solar panels under 800W to connect via domestic sockets without electrician installation, and launches trial allowing suppliers to offer discounted electricity on windy days in constrained areas instead of paying wind farms to switch off. The Future Homes Standard also mandates low-carbon heating systems like heat pumps in new builds, while plug-in solar will be available in shops within months through retailers like Lidl and Amazon.

DESNZ proposes to expand the exclusion zone around Eskdalemuir seismic array from 10km to 15km radius, blocking around 0.8GW of onshore wind pipeline but unlocking 3-6GW between 28-50km through updated seismic measurement methodology. The consultation introduces a Seismic Impact Limit of 0.004614-0.005479 nm/√MW to ration remaining seismic 'headroom' and requires determining authorities to refuse applications that breach thresholds rather than treat MOD objections as mere material considerations.

Consultation on expanding permitted development rights for onshore wind turbines in England. Proposes relaxing planning restrictions that have effectively blocked new onshore wind since 2015.

NESO published results from its November 2025 Call for Input on demand connections, receiving 243 responses representing over 90GW of demand capability. Data centres dominate at 55% of total capacity (50.8GW), with 81% of all projects willing to accept alternative connection arrangements like phased or non-firm connections for earlier dates. Connection dates span 2027-2035, with 40% of projects seeking pre-2030 energisation.

Government accepts 47 recommendations from the Nuclear Regulatory Review to consolidate nuclear regulation, merge ONR and DNSR by 2028, and establish a Nuclear Commission to resolve regulatory conflicts. Implementation commits to delivery by end-2027 subject to legislative timelines, with a Nuclear Regulatory Implementation Panel to hold government and industry accountable.

Government proposes using new statutory powers to accelerate grid connections for strategic demand projects, including data centres and AI Growth Zones, through queue management reforms, capacity reservation, and reallocation mechanisms. The proposals would impose higher financial requirements on data centres to address speculation in the 125GW demand queue, while creating prioritisation systems for government-identified strategic projects. Consultation closes 15 April 2026.

DESNZ launches the Advanced Nuclear Framework enabling privately-led SMR, AMR and MMR projects through a government Pipeline process offering limited endorsement and potential revenue support. Projects submit detailed plans across technology, finance, siting, and operations for structured assessment by DESNZ and Great British Energy-Nuclear. Pipeline membership provides a statement of credibility, access to discussions on CfD-style revenue support and high-impact low-probability risk protections, plus potential National Wealth Fund investment.

DESNZ will enable government to prioritise strategically important demand projects (AI data centres, industrial sites) in transmission connection queues while requiring higher financial commitments from developers to tackle speculative applications. The demand connection queue grew 460% in six months to June 2025, creating waits up to 15 years. Ofgem will consult on increased deposits or fees for queue participants who miss milestones.

The Clean Industry Bonus allocates extra CfD revenue support to offshore wind projects that invest in sustainable supply chains, with applications opening 13-21 May 2026. Projects must meet minimum standards including Fair Work Charter signatory status, Industrial Growth Plan contributions, and specified investment thresholds. Performance-related adjustments apply to CfD payments if minimum standards are not met, with bonus payments withheld if non-financial standards fail.

NESO updates queue management guidance with new milestone calculation methods and evidence requirements for transmission connections. The guidance incorporates recent code changes CMP434 and CMP435 that implement connections reform, establishing eight mandatory milestones that developers must meet or face termination. Projects must now demonstrate progression through planning, land rights, construction planning, financial commitment, and construction initiation phases with specific evidence requirements and timelines calculated backwards from completion dates.

NESO has issued the Go-Live Notice for Slow Reserve service, opening the Enduring Auction Capability (EAC) auction on 17 March with the first auction on 31 March 2026. This triggers the end of STOR service at 05:00 on 1 April 2026. Slow Reserve provides frequency management through post-fault energy balancing, requiring units to respond within 15 minutes with minimum 1MW capability.

NESO launches a call for input on Reformed National Pricing (RNP) proposals to reform dispatch arrangements and electricity market design, with responses due 14 April 2026. The RNP programme aims to strengthen investment signals, improve operational efficiency, and reduce constraint costs within Great Britain's retained single national wholesale market. Government will provide legislation as required for timely delivery.

DESNZ proposes extending CfD eligibility to existing nuclear plants seeking lifetime extensions, requiring legislation changes to enable subsidised investment in plant refurbishments. The consultation runs until early 2025 with no specified implementation timeline. This would apply CfD strike prices to plants that currently operate merchant, potentially covering substantial refurbishment costs at Sizewell B and other AGR stations nearing end of design life.

DESNZ proposes changes to Capacity Market rules affecting CfD projects, Long Duration Electricity Storage, and delivery assurance ahead of 2026 prequalification. Key changes include allowing CfD units strategic participation in CM, setting LDES Cap and Floor eligibility criteria, and raising termination fees by 30% or simplifying to single £45,500/MW fee. Multiple Price Capacity Market eligibility tightens with higher CapEx thresholds and disconnection certificate requirements.

CMP466 enables generators to recover costs of providing Electromagnetic Transient (EMT) models required under Grid Code GC0168. The modification follows after CMP456 and addresses the financial burden placed on existing generators, particularly older plant with complex systems. CUSC Panel initially rejected urgency but assigned high priority status on 5 February 2026.

Ofgem approved CMP463, freezing Specific Onshore Expansion Factors at 2025/26 levels from 1 April 2026. The modification prevents large unexpected increases in these TNUoS charges that would have resulted from the 2026 Price Control. The freeze is temporary, pending a fundamental TNUoS review.

NESO proposes to socialise transmission connection asset costs and cap customer contributions through CUSC modification CMP460. The modification seeks to create more certain charging by reducing direct customer charges for connection infrastructure. Workgroup consultation runs 28 January to 18 February 2026.

Ofgem opens review of energy system cost allocation and recovery, examining how network, wholesale, policy, and retail costs are recovered from domestic and non-domestic consumers. The review considers alternatives to current standing charge structure, including block tariffs, time-of-use charging, location-based pricing, and ability-to-pay options. Consultation closes 24 September 2025 with policy options expected end-2025.

DESNZ consults on streamlining land rights and consents processes for electricity network infrastructure to enable faster deployment. The consultation follows a 2022 call for evidence and targets reducing costs, complexity and delays that currently hinder network projects. Minor changes to existing infrastructure will be fast-tracked to free resources for complex cases requiring detailed scrutiny.

CMP456 creates a cost recovery mechanism for generators required to produce Electro Magnetic Transient (EMT) models under GC0168, shifting the financial burden from plant operators to system users. The modification addresses 'significant' costs imposed on older generators with multiple discrete systems who gain no direct benefit from producing these grid stability models. Authority rejected urgent processing in December 2024, with the CUSC Panel designating this high priority in January 2025.

DESNZ and Ofgem propose standard licence conditions for code managers and update CMA appeals process following Energy Act 2023. Code managers will replace industry panels with licensed entities that set budgets, recommend modifications to Ofgem, and align codes with Ofgem's Strategic Direction Statement. Appeals trigger when Ofgem disagrees with code manager recommendations, replacing current panel-based triggers.

CMP453 proposes to charge BSUoS on net rather than gross flows for BSC Trading Units, meaning customers who export more than they import would not pay system balancing costs. The CUSC Panel recommended the change by majority on 31 October 2025, with the Final Modification Report sent to Ofgem on 11 November 2025. The modification follows Standard Governance through a Workgroup process.

DESNZ is revising National Policy Statements EN-1, EN-3, and EN-5 to align with Clean Power 2030 targets, including bringing onshore wind back into the Nationally Significant Infrastructure Projects regime. The consultation on material changes runs until 23 June 2025. These NPSs guide Planning Inspectorate decisions on major energy infrastructure applications.

DESNZ proposes relaxing CfD eligibility to allow offshore wind projects without full planning consent to bid in AR7, opening summer 2025. The consultation considers extending CfD contract terms beyond the current 15 years and giving the Secretary of State greater visibility over sealed bid information to set budgets. AR7 budget allocation will use different criteria for fixed-bottom offshore wind.

DESNZ opens consultation on National Policy Statement EN-7, which will set planning policy for nuclear power stations deploying after 2025. The NPS replaces outdated planning guidance and determines how Planning Inspectorate assesses Development Consent Orders for new nuclear projects. This affects all nuclear development beyond current committed projects like Hinkley Point C and Sizewell C.

NESO proposes Grid Code changes to replace Mandatory Frequency Response (MFR) with a new Real-time Dynamic Regulation service from 2026/27. The two products will run in parallel until 2029 before MFR is phased out. The Panel rejected the initial proposal in March 2026 for lacking clarity on defect and scope.

DESNZ launches a review of Ofgem's role and powers, citing consumer protection concerns and the need for higher standards in energy markets. The review will examine the regulator's functions and delivery mechanisms. No specific timeline or scope limitations are provided.

NESO formalises a Demand Control Rotation Protocol allowing rolling blackouts for 3-24 hours during supply shortfalls, modifying Grid Code OC6. The modification affects Distribution Network Operators, NESO, and consumers, with cross-code impacts on the Distribution Code. Panel recommendation has been deferred to address Load Lock definition issues with the Energy Network Association.

CMP445 proposes to pro-rate first-year TNUoS charges for generators from their charging date rather than charging the full annual amount upfront. The modification was denied urgent treatment by the Authority in December 2024 and is proceeding through standard governance, with workgroup consultation closing 22 August 2025. The CUSC Panel placed this high on their prioritisation stack in March 2025.

DESNZ proposes changes to the Capacity Market to maintain security of supply while enabling unabated gas plants to decarbonise. The consultation combines proposals for rule changes with a call for evidence on future market design. No specific mechanisms or parameters are detailed in this announcement.

CMP442 allows generators to fix their TNUoS charges against NESO's forecasted tariffs, converting variable transmission charges into predictable costs. The modification follows standard governance through workgroup process, with first workgroup meeting planned for 16 December 2024. CUSC Panel initially prioritised this as high but downgraded to medium priority in February 2025 following Ofgem's transmission charging modification prioritisation guidance.

The government increased AR6 CfD budget to over £1.5 billion, up 50% from the March allocation. Offshore wind receives £1.1 billion (£300m increase), established technologies get £185m (£65m increase), and floating offshore wind and emerging technologies receive £270m (£165m increase) including £15m ringfenced for tidal stream.

OpTIC replaces the Transport component of TNUoS with an economic market model that creates transmission charges based on assumed optimal network investment in a zonal market structure. The proposal aims to charge generators and suppliers as if they operated in a zonal wholesale market rather than the current uniform pricing system. Workgroup activity starts Spring 2025 after the CUSC Panel prioritised it as Medium.

Ofgem and DESNZ propose new licences for the National Energy System Operator (NESO), which will combine electricity system operation and gas system planning functions. NESO will hold both an Electricity System Operator licence and a Gas System Planner licence when designated as the Independent System Operator and Planner (ISOP). The consultation also proposes modifications to transmission, distribution, generation, supply, interconnector, smart meter communication, and gas transporter licences to accommodate NESO's expanded role.

DESNZ launches second REMA consultation with narrowed options for fundamental electricity market redesign. The consultation runs until May 2024 and follows the first consultation's identification of market failures in current arrangements. This represents the most significant potential reform to GB electricity markets since BETTA, with options including central dispatch, locational pricing, and enhanced market-based coordination.

Government sets £1 billion budget for CfD Allocation Round 6, the largest allocation round budget to date. The budget was announced in the Chancellor's Spring Budget on 6 March 2024. AR6 will support renewable energy projects through strike price guarantees.

Grid Code modification GC0168 will require certain generators and network operators to provide electromagnetic transient (EMT) models to NESO for analysis of system stability as inverter-based resources displace synchronous generation. The modification follows standard governance through a workgroup process, with high impact on generators, transmission operators, distribution networks, interconnectors and transmission owners. Timeline has been repeatedly delayed, with workgroup report submitted June 2025 but Panel requesting further legal text review.

Ofgem's initial project assessment of Offshore Hybrid Asset pilot projects. OHAs combine offshore wind connections with interconnector functionality, allowing cross-border power flows on the same infrastructure.

DESNZ published AR6 parameters raising offshore wind strike prices and separating offshore wind into its own pot, alongside launching consultation on sustainable industry rewards for AR7. The ASP increases address the failed AR5 auction where no offshore wind projects bid. DESNZ also proposes additional CfD revenue for projects demonstrating supply chain sustainability from AR7.

CMP423 proposes switching from a demand-weighted to generation-weighted Reference Node for TNUoS charging calculations. The CUSC Panel has recommended approval by majority, with the Final Modification Report sent to Ofgem on 9 December 2025. This changes how transmission charges are calculated and allocated across the network.

CMP419 proposes to revise generation transmission charging zones to include offshore wind farms connected under the Holistic Network Design, allowing these generators to pay wider transmission tariffs rather than local rates. The modification has been deprioritised from Medium-High to Low as of September 2025, with workgroup activity stalled since 2024. This follows Authority expectations from previous zoning decisions CMP324 and CMP325.

DESNZ published Allocation Round 5 parameters and a consultation on future CfD rounds. AR5 opens March 2023 with pot structure, Administrative Strike Prices, and delivery years now confirmed. The consultation on AR6 and beyond closes 7 February 2023.

CMP405 proposes to separate TNUoS demand charges into year-round locational signals and peak security signals, charging storage that imports outside Triad periods while rewarding it during other times. The modification has been deprioritised as low priority by CUSC Panel despite proposer requests for urgency, with Ofgem rejecting urgent treatment in January 2025. Panel confirmed low priority status in March and September 2025, effectively stalling progress.

Ofgem removes BSUoS charges from generators from 1 April 2023, shifting system balancing costs entirely to demand. CfD projects in Allocation Round 4 will have strike prices adjusted downward from that date to reflect the removal of this cost. The change implements code modification CMP308.

CMP375 proposes changes to how the Expansion Constant and Expansion Factors are calculated in TNUoS charging, affecting how transmission network investment costs are recovered from users. The modification received unanimous Panel support for the Original solution and majority support for WACM2 in January 2024. Ofgem's decision date has slipped repeatedly from September 2024 to February 2025, with the current expected decision date to be confirmed.

Government confirms major changes to CfD scheme for Allocation Round 4, including a third offshore wind pot, administrative strike price for floating offshore wind, and extension of negative pricing rule to stop payments when day-ahead prices go negative. Coal-to-biomass conversion projects are excluded from future rounds. Second consultation runs until 18 January 2021 on implementation details.

Allocation Round 3 awarded CfDs to 12 renewable projects totalling 5.8GW capacity, 2.4GW more than Round 2 in 2017. Projects include offshore wind, advanced conversion technologies, and remote island wind, delivering by 2025. This represents a substantial expansion of subsidised renewable capacity under long-term price guarantees.

CMP315 proposes to review how the transmission network expansion constant is determined, which directly affects locational TNUoS charges paid by generators and large users. The modification has been in development since 2019, with the final decision now expected by February 2025. The Panel recommended the original solution by majority vote in January 2024.

The second CfD allocation round opens with a £290m budget for delivery years 2021/22 and 2022/23, with applications closing 21 April 2017. This provides 18 days for eligible renewable projects to submit competitive bids through National Grid's allocation process.

Secretary of State approves non-material change to North Killingholme CCGT (Uniper). Routine planning amendment.

Pre-announcement for RO certificates and generation data: December 2025.

UK territorial GHG emissions statistics index page.

UK territorial greenhouse gas emissions fell 2% in 2025 to 367 MtCO2e, down 54% from 1990. CO2 made up 78% of the total. Rate of decline is slowing as easy wins (coal closure) are exhausted.

Renewables statistics landing page.

DESNZ publishes Clean Power 2030 tracking metrics showing clean generation share, clean demand share, and emissions intensity. Annual data in GWh and percentage shares.

Energy Trends special feature reviewing solid biomass classifications in UK energy statistics.

Duplicate listing of Energy Trends March 2026 biomass special feature.

Energy Trends Q4 2025 and full-year 2025. Renewables reached a record 52.5% share of electricity generation (152.5 TWh). Wind hit 30.0% (87.1 TWh) and solar rose 37% to a record 20 TWh. Nuclear fell to a record low — low carbon share barely moved from 64.6% to 64.8%.

Energy Trends UK electricity chapter. Generation -1.9%, exports +38%.

Renewables Obligation certificates and generation statistics. Tracks ROC issuance volumes by technology and accredited generating stations.

Elexon launching API-based asset registration for the Balancing Mechanism on 31 March 2026, linking to their Customer Solution Platform. Reduces friction for flexibility providers entering the BM.

The Distribution Code proposes consolidating EREC G98 and EREC G99 distributed generation connection guides into a single document. This annual revision follows Distribution Code requirements with consultation planned for March 2025. The change streamlines guidance for generators connecting at different scales rather than altering connection rules themselves.

The Distribution Code modification EREC G59 Issue 3 A8 adds supplementary sections to facilitate intentional islanding during system restoration processes. This builds on existing Engineering Recommendation G59 guidance for distributed energy resources. The modification enables controlled isolation of network sections while maintaining local supply during wider system recovery.

EREC G99 adds supplementary sections to facilitate intentional islanding during system restoration. This is a code modification to the distribution connection standard. The change enables grid-connected assets to operate in isolation when the grid is being restored after blackouts.

The Standard Application Form (SAF) v11 for EREC G99 connections updates the formal document used to apply for connecting power generating modules exceeding 16A per phase to distribution networks. The form covers solar, wind, battery storage, and other generation technologies connecting under G99 requirements. This appears to be a routine version update to existing connection application procedures.

Distribution network operators assess whether to create explanatory guidance supporting Engineering Recommendation P28 Issue 2, which sets technical standards for distributed generation connections. The proposed Engineering Report would provide additional technical application guidance but would not change P28 itself. No timeline or specific technical areas are identified.

CMP470 proposes introducing a commitment fee floor for all technologies that are oversubscribed relative to Clean Power 2030 capacity targets. The modification targets generation developers with high impact and transmission owners with medium impact. It is proceeding through urgent governance route to workgroup stage.

NESO expands its Demand Flexibility Service to allow participants to be rewarded for increasing electricity consumption during periods of excess supply, alongside existing rewards for demand reduction. The service threshold drops from 1MW to 0.1MW, opening participation to smaller suppliers and businesses. Over 2.46 million businesses and consumers have already signed up.

NESO published guidance on its connections reform programme, including a new delivery pipeline prioritising 381.5GW of 'ready-to-build' capacity and announcing permanent leadership structure under new Director of Connections Colm Murphy from 13 April. The reform moves from a chronological queue to a delivery pipeline based on project readiness, with claims of unlocking £40bn annual investment.

NESO establishes a programme to track and enable demand-side flexibility participation in its balancing services markets, targeting 10-12 GW of demand flexibility by 2030. The programme includes quarterly reporting of participation levels and a Routes to Market Review to remove barriers for demand-side participants. Data relies on self-reported confirmations from asset owners, with NESO encouraging non-respondents to contact them for comprehensive representation.

NESO publishes quarterly updates on its review to remove barriers preventing demand-side flexibility from participating in system operator markets. The review has completed three stages and now publishes quarterly progress reports tracking barrier removal, with a data dashboard monitoring participation volumes. The programme follows NESO's Clean Power 2030 advice identifying demand-side flexibility as essential for operating a decarbonised system.

Code modification GSR038 proposed to remove the requirement for two offshore AC transformers at grid entry points of 90MW or more has been withdrawn. The modification aimed to assess restrictions in Grid Code Clause 7.7.1.1 that effectively mandated dual transformer configurations. NESO classified it as having high impact on offshore transmission owners and generators.

DESNZ publishes the CHPQA Standard that sets Quality Index thresholds for Combined Heat and Power plants to qualify for 'Good Quality' certification. Different versions apply based on when schemes commenced operation or entered CfD contracts, with Issue 7 (December 2018) applying to CfD schemes, Issue 6 (September 2016) to schemes operating from 2016, and Issue 5 (November 2013) to earlier schemes. The Standard determines eligibility for various benefits excluding Renewables Obligation and Contracts for Difference support.

DESNZ and Ofgem propose mandatory baseline cyber security requirements for all 1,400+ Ofgem licensees through licence conditions, using Cyber Essentials certification as the starting point. The proposal also expands Network and Information Systems (NIS) Regulations to capture more distributed energy operators deemed critical to system stability. NESO will provide independent advice on which services and operators should fall under the enhanced NIS framework.

Ofgem and DESNZ propose baseline cyber security requirements for all energy licensees, plus expanded Network and Information System Regulations coverage. The consultation seeks to standardise cyber resilience across downstream gas and electricity sectors through mandatory minimum requirements. No specific thresholds, costs, or implementation dates are provided.

DESNZ launches new self-assessment portal for Combined Heat and Power Quality Assurance (CHPQA) scheme, replacing legacy digital service. CHP operators must register on the new portal to submit certification applications. Four existing forms (F1-F4) are now redundant.

DESNZ provides worked example for calculating Z-ratios through plant performance testing for combined heat and power qualification assessment. The example demonstrates solving simultaneous equations from three test conditions to determine specific electricity generation rates for different steam extraction points. This determines the Z-factor that measures efficiency loss when diverting steam for heat rather than electricity generation.

DESNZ requires Combined Heat and Power Quality Assurance (CHPQA) operators to report annual fiscal benefits received from certification including Climate Change Levy exemptions, Carbon Price Support reductions, and business rates relief. The guidance provides calculation methods for benefits worth millions annually to individual operators (£13.4m in example for 150 MW plant). This data collection supports policy development as government reviews CHP tax treatments.

DESNZ published updated CHPQA guidance for biomass and waste CHP schemes accessing support through the Renewables Obligation and Contracts for Difference. The guidance clarifies quality index calculations, certification requirements, and eligibility criteria for schemes claiming higher ROC payments or CfD support by demonstrating good quality CHP operation. It covers different fuel categories with specific formulae and includes safeguards for schemes supplying heating networks.

DESNZ guidance explains how CHP schemes with CHPQA certification can claim exemption from business rates on specific plant and machinery. The exemption covers power generation equipment (turbines, generators, engines) and accessories but excludes heat recovery plant and buildings. Schemes must hold a Secretary of State CHP Exemption Certificate and follow prescribed procedures with local Valuation Officers.

DESNZ has updated guidance on how combined heat and power (CHP) operators can use CHPQA certificates to claim exemptions from climate change levy and fuel duty. The guidance covers fuel input exemptions, carbon price support liabilities for schemes above 2 MWe, and electricity output relief calculations.

DESNZ publishes guidance on calculating Z ratios for Combined Heat and Power schemes with steam turbines, defining how to measure the trade-off between power generation and heat supply when steam is extracted at different pressures. The guidance provides reference tables showing Z ratios from 3.9 to 8.1 depending on turbine size (2-50+ MWe) and steam pressure (2.4-21.7 bar). Operators must determine their specific Z ratio through measurement or calculation, with fallback to tabulated values if testing is not feasible.

DESNZ updates guidance on calculating qualifying power capacity for combined heat and power schemes under the CHP Quality Assurance programme. The guidance sets minimum operational hours required for different scheme types (500-1000 hours annually) and establishes calculation methods for schemes that fail to meet quality index thresholds. This determines what proportion of CHP capacity qualifies for support mechanisms.

DESNZ updated guidance on calculating qualifying power output for CHP schemes that fail to meet minimum quality index thresholds. Schemes must achieve QI of 100 (or 95 for new schemes) for all power output to qualify as Good Quality CHP. Those below threshold must calculate reduced qualifying output using heat-to-power ratios and efficiency formulas.

DESNZ updates guidance on calculating qualifying fuel input for CHP schemes that fail to meet the 20% power efficiency threshold for Good Quality CHP status. The guidance provides a specific formula: CHPQFI = Annual Power Efficiency × Total Fuel Input ÷ Power Efficiency Threshold. This is version 3 of Guidance Note 25, published March 2026.

CHPQA Guidance Note 18 details how Combined Heat and Power operators should calculate and report uncertainties in energy input and output measurements when self-assessing their schemes for quality assurance purposes. The guidance provides mathematical methods for propagating measurement uncertainties through calculations, requiring operators to assign realistic uncertainty values and demonstrate overall uncertainty below specified thresholds. This updates technical procedures for an existing certification scheme that validates CHP efficiency claims.

DESNZ published a simple guide to the Combined Heat and Power Quality Assurance (CHPQA) programme, explaining application procedures for CHP certification. The guide covers registration, submission requirements for simple schemes (≤2 MWe, single reciprocating engine) versus complex schemes, and certification timescales. It also details how certified CHP operators can claim Climate Change Levy exemption, Carbon Price Support exemption, and renewable support through ROCs, CfDs, and RHI.

Government grants £64 million to Associated British Ports for design and engineering work to develop Port Talbot as a floating offshore wind port. The port would support 4.5 GW of Celtic Sea floating wind projects following Crown Estate seabed leasing. Funding is subject to Subsidy Advice Unit approval and final government sign-off.

Ofgem sets out five options for redesigning transmission network charges to steer investment towards Strategic Spatial Energy Plan locations, ranging from tweaking existing TNUoS to auctioning connection capacity by zone. Charges would apply to new generators, demand, and storage. Responses by 26 May 2026, reforms targeted for 2029.

Vestas announces conditional plans for a Scottish wind component factory creating 500 jobs, contingent on AR7 and AR8 orders. DESNZ launches a trial allowing suppliers to offer discounted electricity on windy days when wind farms would otherwise be constrained off. The factory announcement follows AR7 securing 8.4GW of offshore wind capacity.

DESNZ launched an interactive map showing clean energy projects supported by government funding since July 2024, including National Wealth Fund and Great British Energy investments. The map displays investment amounts and job figures for featured projects. More projects will be added as they are announced.

Government sets strategic framework for expanding interconnection beyond current 10.3GW operational capacity and 7.45GW under development, moving from market-led Cap and Floor regime to planned approach aligned with NESO's Strategic Spatial Energy Plan due autumn 2027. New delivery framework will identify optimal location, capacity and connecting countries for interconnectors and Offshore Hybrid Assets combining cables with wind farms.

Ofgem proposes strategic planning-led interconnector development where NESO identifies projects and government sets delivery and financing arrangements. The consultation closes 1 May 2026. This shifts from developer-led merchant models to centrally planned interconnection aligned with wider system needs.

DESNZ proposes a bill discount scheme offering households within 500 metres of new transmission infrastructure £250 annually for 10 years, funded by an obligation on all electricity suppliers who will pass costs to all customers via bills. The scheme covers new overhead lines and substations from 2027, with eligible households identified automatically via their MPAN, plus an opt-in route for those on commercial meters or off-grid. Administrative costs are socialised across all billpayers while benefits flow only to those hosting infrastructure.

Government introduces regulations requiring majority of new homes in England to have solar panels fitted as standard from 2028 under the Future Homes Standard, removes regulatory barriers for plug-in solar panels under 800W to connect via domestic sockets without electrician installation, and launches trial allowing suppliers to offer discounted electricity on windy days in constrained areas instead of paying wind farms to switch off. The Future Homes Standard also mandates low-carbon heating systems like heat pumps in new builds, while plug-in solar will be available in shops within months through retailers like Lidl and Amazon.

DESNZ launches consultation on a £5 billion Warm Homes Fund offering government-backed loans and investments for domestic solar, batteries, heat pumps, and energy efficiency measures. The fund targets upfront cost barriers through financial transactions rather than grants. Consultation closes on an unspecified date seeking views from installers, manufacturers, housing providers, and finance institutions on fund design and target groups.

DESNZ seeks evidence on nuclear third party liability limits for Small Modular Reactors and Advanced Modular Reactors, which by default face the same €1.2bn liability requirement as gigawatt-scale plants by 2027. The consultation runs until 1 June 2026 and covers both electricity-generating SMRs and non-electric applications like hydrogen production or industrial heat. Current liability arrangements require operators to secure insurance cover up to their liability limit, with lower limits available only for prescribed lower-risk sites.

Government and Ofgem establish a data domain model with four coordinators (NESO, RECCo, Elexon) to standardise energy system digitalisation, replacing the current fragmented initiative-led approach. The framework introduces a digitalisation coordination function and mandates interoperability between Data Sharing Infrastructure (DSI) and Consumer Consent Service (CCS). Implementation begins immediately with interim governance, moving to full coordination function by 2028-29.

DESNZ proposes to expand the exclusion zone around Eskdalemuir seismic array from 10km to 15km radius, blocking around 0.8GW of onshore wind pipeline but unlocking 3-6GW between 28-50km through updated seismic measurement methodology. The consultation introduces a Seismic Impact Limit of 0.004614-0.005479 nm/√MW to ration remaining seismic 'headroom' and requires determining authorities to refuse applications that breach thresholds rather than treat MOD objections as mere material considerations.

DESNZ published technical guidance and tools for UK ETS compliance, including emission factors and reporting templates for installations and aircraft operators. The collection provides operational documentation for existing carbon pricing obligations rather than policy changes.

DESNZ publishes guidance for operators on UK ETS baseline data collection and hospital/small emitter applications, covering the submission window from 1 April to 30 June 2025. The guidance explains how to complete templates for the 2027-2030 allocation period and applies to installations seeking free allocation or USE/HSE status. Operators must submit verified baseline data reports to avoid losing free allocation eligibility.

Government confirms administrative changes to CfD scheme allowing NESO to correct assessment errors and consider new evidence for non-material application omissions at appeal stage. Changes include project-specific pauses when qualification decisions are reversed, refined pending application rules, and new procedures for floating offshore wind projects. Regulations will be amended before AR8 opens, with detailed arrangements set in Contract Allocation Framework.

DESNZ published its methodology for converting renewable capacity into generation estimates and 'homes powered' figures used in government communications. The department applies standardised load factors from CfD Round 7 frameworks, accounts for grid losses using DUKES data, and compares results against median household consumption rather than mean to avoid skewing from high-consumption households.

DESNZ consults on revising secondary legislation and planning guidance for managing wind turbine interference around the Eskdalemuir seismic array. The seismic array, used for nuclear test detection, creates exclusion zones that restrict onshore wind development in parts of southern Scotland. Scottish Renewables has developed an industry tool to help manage interference.

Ofgem published its administrative schedule for issuing Renewables Obligation Certificates (ROCs) for the period April 2026 to March 2027. Generators must submit monthly output data by the end of the second month following generation, with ROCs issued roughly three weeks later. The schedule maintains existing deadlines with no changes to ROC allocation or pricing mechanisms.

NESO published updated Connections Reform methodologies in March 2026, extending the Evidence Submission Window closure beyond July 29, 2025 due to portal issues and query response delays. The methodologies cover the Gate 2 Two-way Queue (G2TWQ) process, including network design criteria, project designation rules, and gate progression requirements.

Ofgem publishes quarterly and annual timetables for the Offtaker of Last Resort levelisation process covering April 2026 to March 2027. The schedule sets deadlines for BPPA generation data submission, invoice distribution, payment collection and distribution across four quarterly periods and one annual reconciliation. Levelisation only occurs if a Backstop Power Purchase Agreement is active in the preceding year.

The Warm Homes Plan commits £15bn over 2025-2028 to upgrade 5 million homes with heat pumps, solar panels, and insulation, targeting 450,000 annual heat pump installations by 2030. The plan combines capital grants for low-income households with minimum energy efficiency standards for rental properties, funded through general taxation rather than energy bills. The programme represents the largest capital allocation to home energy efficiency to date.

DESNZ proposes extending permitted development rights to allow businesses, schools and farms in England to install onshore wind turbines up to 30 metres without planning permission. The proposal removes the current restriction limiting these rights to small domestic turbines only. Implementation timing is not specified.

DESNZ proposes new permitted development rights for non-domestic wind turbines up to 30m tip height and 200m² swept area, allowing single turbines on farms, businesses and public sites without planning applications. The proposal requires prior approval from local planning authorities for siting and amenity impacts, with buffer distances of tip height plus 10% from site boundaries and ten times rotor diameter from neighbouring homes. Consultation closes 10 June 2026 with policy expected in autumn.

DESNZ publishes updated levelised cost estimates (LCOE) for electricity generation technologies, with significant upward revisions for offshore wind and gas plants due to supply chain pressures and commodity price increases. Solar and onshore wind costs remain relatively stable. Hurdle rates increase 1-2 percentage points across all technologies, while carbon price assumptions no longer converge to the social cost of carbon, reducing long-term costs for gas generation.

DESNZ commissioned Lucy Yu to review AI deployment in electricity networks, examining applications across grid planning, operations, and management. The review will map current AI applications, identify deployment barriers, assess system benefits and risks, and provide recommendations by Summer 2026. The scope covers transmission and distribution applications, regulatory landscape, and enabling conditions like data access and testing environments.

Energy suppliers must reduce domestic tariffs from April 2026, receiving government funding for 75% of Renewables Obligation costs (£1.4bn annually) while removing Energy Company Obligation costs following ECO4/GBIS scheme closure. RO tariff reductions apply via volumetric discounts or automatic adjustments for price-capped customers, with suppliers required to execute deeds and maintain qualifying bank accounts for grant payments. The scheme runs until March 2029 with quarterly reconciliation based on actual versus assumed domestic supply volumes.

Consultation on expanding permitted development rights for onshore wind turbines in England. Proposes relaxing planning restrictions that have effectively blocked new onshore wind since 2015.

The Chancellor's Mais Lecture outlines a strategy for investment-led growth through an 'active and strategic state', including energy security measures and industrial policy. Key energy commitments include lifting the onshore wind ban, investing in offshore wind and nuclear (Sizewell C, small modular reactors), and implementing the Fingleton Review to accelerate nuclear deployment. The government claims these measures have reduced gas imports by 17% since 2021 and enabled a £117 average reduction in the energy price cap.

This guidance document explains the UK Emissions Trading Scheme, which applies to power generation installations above 20MW thermal input, energy-intensive industries, and aviation. Operators must surrender allowances annually by 30 April to cover verified emissions. Free allocation is provided to reduce carbon leakage risk, with a baseline data collection exercise running 1 April - 30 June 2025 for the next allocation period.

DESNZ published UN location codes for offshore installations as part of extending the UK ETS to maritime activities from 2026. The guidance lists installations that will be subject to carbon pricing under the amended trading scheme. This supports implementation of the draft Greenhouse Gas Emissions Trading Scheme (Amendment) (Extension to Maritime Activities) Order 2026.

The government sets out a £2.5bn fusion strategy over five years, primarily funding STEP prototype plant development at West Burton and R&D facilities. The strategy aims to develop UK fusion industrial capability through UKAEA Group restructuring and private sector partnerships. Most funding flows to construction and engineering contracts rather than direct energy market interventions.

UK Industrial Fusion Solutions appoints ILIOS as construction partner for the STEP Fusion programme at West Burton under a £200 million contract. The consortium will act as principal design and build contractor for the prototype fusion plant, managing all construction aspects through to planned operation in 2040. Construction is expected to support up to 8,000 onsite jobs at peak.

The 2025 Capacity Market T-4 auction cleared at £27.10/kW/year for delivery in 2029/30, procuring 40.1GW of capacity. Deloitte's audit confirms NESO ran the auction in compliance with market rules, with 254 generators awarded contracts ranging from gas plants to battery storage to demand response.

DESNZ announces plug-in solar panels will be made available in the UK for the first time, alongside bringing forward the next renewables auction to July 2026 and accelerating £130m of devolved funding for home upgrades to additional mayors. The plug-in solar allows households to connect portable panels directly to mains sockets without grid export arrangements.

NESO issues mandatory Information Request Notice to transmission-level demand customers and co-located generation projects to gather detailed project readiness data. The IRN requires complete responses by 13 April 2025, building on last year's voluntary Call for Input which saw 460% queue growth. NESO uses statutory information gathering powers to compile evidence for Ofgem's Demand Connections Reform programme.

NESO published results from its November 2025 Call for Input on demand connections, receiving 243 responses representing over 90GW of demand capability. Data centres dominate at 55% of total capacity (50.8GW), with 81% of all projects willing to accept alternative connection arrangements like phased or non-firm connections for earlier dates. Connection dates span 2027-2035, with 40% of projects seeking pre-2030 energisation.

DESNZ publishes monthly statistics covering electricity generation, consumption, and retail prices alongside broader energy production and trade data. The January 2026 data includes electricity market fundamentals, retail price movements, and EU comparative pricing. This is routine statistical publication providing market context rather than announcing policy changes.

DESNZ opens applications for CCUS projects seeking connection to the East Coast Cluster Teesside network by 2032. Expression of interest deadline is 10 March 2026, with full applications due 10 April 2026. The process allocates remaining capacity at the Endurance offshore storage site through competitive assessment.

Government accepts 47 recommendations from the Nuclear Regulatory Review to consolidate nuclear regulation, merge ONR and DNSR by 2028, and establish a Nuclear Commission to resolve regulatory conflicts. Implementation commits to delivery by end-2027 subject to legislative timelines, with a Nuclear Regulatory Implementation Panel to hold government and industry accountable.

Government accepts Nuclear Regulatory Taskforce recommendations to streamline nuclear planning and regulation, with all reforms to be completed by end-2027. The taskforce found an 'overly complex' and 'bureaucratic' system that favoured process over outcomes. New £65.6m funding will train 500 doctoral students across 4 intakes, quadrupling current nuclear PhD numbers.

UK ETS covers 25% of territorial emissions across power, industry and aviation, creating carbon price through cap-and-trade system. Authority expanding to maritime (July 2026), waste incineration (2028), and greenhouse gas removals (2029). May 2025 UK-EU agreement to work towards linking schemes, with negotiations begun December 2025.

DESNZ proposes to simplify UK ETS permitting for cross-boundary CCS pipelines by reducing the number of permits required from multiple regulators to a maximum of two. Current rules require separate permits from each jurisdiction a pipeline crosses (England, Scotland, Wales, Northern Ireland, and offshore), plus monitoring infrastructure at each boundary. The consultation runs until 4 June 2026.

Government proposes using new statutory powers to accelerate grid connections for strategic demand projects, including data centres and AI Growth Zones, through queue management reforms, capacity reservation, and reallocation mechanisms. The proposals would impose higher financial requirements on data centres to address speculation in the 125GW demand queue, while creating prioritisation systems for government-identified strategic projects. Consultation closes 15 April 2026.

DESNZ publishes quarterly data showing UK renewable electricity generation reached 35.5 TWh in Q3 2025, up 7.4% year-on-year, driven by 2.9 GW of new solar capacity and 1.0 GW of offshore wind. Total UK energy production hit a record low at 21.2 million tonnes oil equivalent, down 2.5%, with nuclear generation falling 28% due to maintenance outages. Renewables achieved 54.7% of electricity generation, just below Q2's record.

DESNZ published its Winter 2025 Public Attitudes Tracker, a triannual survey of 3,283 UK adults covering awareness and attitudes toward energy policies. The survey shows declining concern about climate change (77%, down from 79% in Summer 2025) and declining support for renewable energy (78%, down from 87% in Autumn 2021). Nuclear energy support held steady at 44%, while heat pump installation likelihood among owner-occupiers dropped to 22% for air source and 12% for ground source systems.

DESNZ publishes annual statistics on MCS-certified domestic battery installations covering April 2025 to March 2026, including capacity and cost data. The MCS database captures installations eligible for various support schemes and provides the primary dataset for tracking behind-the-meter storage deployment. This data informs policy development on distributed storage and network impact assessments.

DESNZ published monthly cost per kW data for solar PV installations during 2025/26, marking this as 'Official Statistics in Development'. The data covers installation costs by month across the financial year. This provides market intelligence on solar deployment costs as the sector scales.

DESNZ launches the Advanced Nuclear Framework enabling privately-led SMR, AMR and MMR projects through a government Pipeline process offering limited endorsement and potential revenue support. Projects submit detailed plans across technology, finance, siting, and operations for structured assessment by DESNZ and Great British Energy-Nuclear. Pipeline membership provides a statement of credibility, access to discussions on CfD-style revenue support and high-impact low-probability risk protections, plus potential National Wealth Fund investment.

DESNZ will enable government to prioritise strategically important demand projects (AI data centres, industrial sites) in transmission connection queues while requiring higher financial commitments from developers to tackle speculative applications. The demand connection queue grew 460% in six months to June 2025, creating waits up to 15 years. Ofgem will consult on increased deposits or fees for queue participants who miss milestones.

DESNZ opens consultation on CfD contract changes to implement Clean Industry Bonus reforms for Allocation Round 8. The consultation closes on 1 April 2026. This follows earlier announcements of the Clean Industry Bonus mechanism designed to incentivise domestic supply chain investment.

DESNZ published updated guidance on participating in UK ETS auctions and secondary markets, incorporating the April 2026 auction reserve price increase from £22 to £28. The guidance details auction clearing mechanisms, cost containment triggers, and eligibility criteria for market participants. ICE Futures Europe continues as the auction platform provider.

DESNZ publishes lists of companies receiving exemptions from CfD/RO costs (as at March 2026) and compensation for RO/FIT costs (up to 2018). The 2026 exemption list covers 521 companies across manufacturing and processing sectors. The 2018 compensation list covers 23 companies, primarily in energy-intensive industries.

The 2025 T-1 capacity auction for delivery year 2026/27 cleared at £5.00/kW/year with 7,192 MW awarded across 15 rounds over two days in March 2026. The clearing price represents a 95% fall from the previous year's £100/kW result. NESO's auction process received clean assurance from Deloitte with no compliance breaches identified.

The government requires energy suppliers to take all reasonable steps to complete domestic smart meter installation by 2030, replacing the current targets framework which expires end-2025. Suppliers must resolve smart meters operating in traditional mode within 90 days and pre-emptively replace assets before 2G/3G shutdown by 2033. Annual deployment plans with binding milestones become mandatory from January 2027.

DESNZ published February 2026 solar PV deployment statistics. This is a routine monthly data release tracking installed solar capacity in the UK. The publication provides market participants with deployment data for commercial and policy analysis.

The Clean Industry Bonus allocates extra CfD revenue support to offshore wind projects that invest in sustainable supply chains, with applications opening 13-21 May 2026. Projects must meet minimum standards including Fair Work Charter signatory status, Industrial Growth Plan contributions, and specified investment thresholds. Performance-related adjustments apply to CfD payments if minimum standards are not met, with bonus payments withheld if non-financial standards fail.

DESNZ published a factsheet reassuring that UK gas supply faces no immediate disruption from Middle East conflict, with Qatar accounting for only 1% of UK gas imports in 2025. The energy price cap will fall 7% (£117 annually) from April-June 2026. The government reiterates its clean energy transition messaging while confirming existing North Sea production will continue via Transitional Energy Certificates.

NESO updates queue management guidance with new milestone calculation methods and evidence requirements for transmission connections. The guidance incorporates recent code changes CMP434 and CMP435 that implement connections reform, establishing eight mandatory milestones that developers must meet or face termination. Projects must now demonstrate progression through planning, land rights, construction planning, financial commitment, and construction initiation phases with specific evidence requirements and timelines calculated backwards from completion dates.

NESO publishes BSUoS charging data including fixed tariffs, monthly forecasts, and payment calendars through March 2026. BSUoS charges recover balancing costs and are paid by final demand customers only since April 2023 reforms. Current fixed tariff structure replaced variable charges following CMP308 and CMP361 implementation.

DESNZ proposes contract amendments to implement Clean Industry Bonus reforms for Allocation Round 8, adding workforce protection measures, skills investment criteria, and extending the bonus scheme to onshore wind for AR9. The consultation runs until March 2026 with final contracts expected before AR8 opens. Changes also include hybrid metering contract amendments affecting all CfD agreements.

NESO publishes detailed guidance for its Enduring Auction Capability (EAC) platform, which conducts co-optimised day-ahead procurement for frequency response and reserve services. The platform uses N-SIDE's algorithm to clear Dynamic Response, Quick Reserve, and Balancing Reserve services together at 14:00 daily, with Slow Reserve to be added in March 2026. Results are published via data portal with monthly archiving for sell orders and annual archiving for other datasets.

Elexon's CFO highlights that non-commodity costs rather than wholesale prices now drive consumer bill pressure, with Market-wide Half-Hourly Settlement progressing from 3 million to target 30 million meters. Smart meter penetration has reached 60-70%, enabling time-of-use tariffs and flexibility services.

NESO has issued Gate 2 offers to transmission-connected projects under connections reform, with customers having 90 days to accept or reject offers. Projects that reject Gate 2 offers revert to Gate 1 agreements, triggering security release processes under CUSC Section 18. Technical queries must be submitted within 4 weeks of receiving offers, with transmission operators providing 2-4 week response times.

NESO has raised a modification to assess whether offshore wind farms of 90MW or more should be required to have two AC transformers at their grid connection point. The current SQSS rule 7.7.1.1 effectively mandates dual transformers for these capacities. The proposal will go to SQSS Panel on 24 March 2026.

NESO has issued the Go-Live Notice for Slow Reserve service, opening the Enduring Auction Capability (EAC) auction on 17 March with the first auction on 31 March 2026. This triggers the end of STOR service at 05:00 on 1 April 2026. Slow Reserve provides frequency management through post-fault energy balancing, requiring units to respond within 15 minutes with minimum 1MW capability.

DESNZ sets the CfD Allocation Round 8 Supply Chain Plan application window from 1-7 April 2026 for large-scale solar and onshore wind projects (300MW+). Prospective applicants must email their intention to submit during the week before the window opens. The department will provide a secure online platform for electronic submissions.

NESO publishes webinar schedules and archive materials for Connections Reform, including upcoming sessions on advancement fees and securities (25 March), plus archived recordings from 2025-2026 covering queue management, offer processes, and evidence submission guidance. The materials support customers navigating the reformed connections process with regular updates on timelines, portal functionality, and technical requirements.

NESO publishes standard weekly Operational Transparency Forum materials - presentation slides and recordings from system operations discussions. The forum runs every Wednesday at 11am, covering recent operational actions in the Electricity National Control Centre.

NESO launches a call for input on Reformed National Pricing (RNP) proposals to reform dispatch arrangements and electricity market design, with responses due 14 April 2026. The RNP programme aims to strengthen investment signals, improve operational efficiency, and reduce constraint costs within Great Britain's retained single national wholesale market. Government will provide legislation as required for timely delivery.

NESO proposes Grid Code changes to implement 'Regional Restoration Plans' following the previous GC0156 modification, standardising how transmission operators coordinate during system blackout recovery. The proposal affects all transmission system operators, transmission owners, network operators and generators, requiring workgroup development under standard governance. Cross-code impacts extend to STC and DCODE.

NESO publishes mock auction results for its Enhanced Ancillary Services (EAC) platform, showing weekly test runs of response-reserve procurements ahead of live operations. The dataset includes buy orders, sell orders, results by unit, and summary statistics from mock auctions scheduled for late September 2023. Live EAC auctions will run daily with results published on a separate page.

NESO publishes quarterly TNUoS tariff data across eight categories including transmission demand residual charges, generator tariffs (onshore and offshore), and embedded export tariffs. The dataset provides granular breakdown of network use charges that recover transmission system costs from users. Files are updated quarterly when tariffs are published, with data available via API and CSV download.

NESO publishes weekly Capacity Market Register data tracking all applications, successful bidders, and capacity agreements across auctions. The register includes component-level detail and historical changes, updated with one-hour frequency. Four CSV datasets cover current status and change histories for both components and Capacity Market Units.

NESO publishes planning methodology documents and consultation responses for Strategic Spatial Energy Plan (SSEP), Centralised Strategic Network Plan (CSNP), and transitional network planning. The SSEP draft methodology consultation closed 20 January 2025, with final methodology expected spring 2025 following government and Ofgem approval. CSNP methodology consultation launches Q2 2025, with tCSNP2 methodology submission to Ofgem by 31 March 2025.

NESO publishes comprehensive guidance for its Dynamic Services suite — Dynamic Containment (DC), Dynamic Moderation (DM) and Dynamic Regulation (DR) — which provide frequency response to keep the grid within 50Hz ±1%. The services require response times from 0.5 seconds (DC/DM) to 2 seconds (DR), with delivery duration from 15 minutes (DC) to 60 minutes (DR). Procurement occurs via the EAC platform with results published on the NESO Data Portal.

CMP465 proposes to allow affected generators to reset their construction progression milestones (M5-M8) back to what they would have been without the G2tWQ (Gate 2 to the West Queue) extension granted until 2026. The modification follows NESO's decision to extend G2tWQ connection offers beyond their original 2025 deadline. It proceeds under urgent modification procedures with Authority decision pending.

NESO publishes its C9 statements page, consolidating balancing service procurement guidelines, methodology statements, and consultation documents previously held under the C16 licence condition. The page hosts current versions of five methodology statements (Procurement Guidelines v28, Balancing Principles v26, BSAD v26, ABSVD v20, SMAF v19) effective from September 2025, plus historical versions and consultation records dating back to 2009. A 2026-27 consultation is open until February 6, 2026.

DESNZ proposes comprehensive cost recovery fees for energy infrastructure planning applications to replace current non-cost-reflective charges. The fixed fee model aims to generate revenue for resourcing planning decisions, with annual fee reviews and potential indicative timescales for applications without statutory deadlines. Consultation responses are due by spring 2026 with implementation following.

DESNZ proposes eight refinements to Contracts for Difference (CfD) terms ahead of Allocation Round 8, including permanent restrictions on re-bidding surrendered capacity, hybrid metering arrangements to reduce costs, and excluding applications with Gate 1 connection offers. The consultation runs until early 2025 with changes taking effect for AR8. Other proposals include extending floating offshore wind delivery timelines, strengthening enforcement against distribution-connected generators gaming merchant revenues, and creating a new deepwater offshore wind technology category.

DESNZ proposes extending CfD eligibility to existing nuclear plants seeking lifetime extensions, requiring legislation changes to enable subsidised investment in plant refurbishments. The consultation runs until early 2025 with no specified implementation timeline. This would apply CfD strike prices to plants that currently operate merchant, potentially covering substantial refurbishment costs at Sizewell B and other AGR stations nearing end of design life.

DESNZ proposes a unified biomass sustainability framework to standardise criteria across sectors including power generation, applying consistent carbon and ecological standards to all biomass use. The framework would affect existing biomass generators and future CfD allocations. The consultation runs until early 2025 with implementation expected by 2026.

DESNZ proposes changes to Capacity Market rules affecting CfD projects, Long Duration Electricity Storage, and delivery assurance ahead of 2026 prequalification. Key changes include allowing CfD units strategic participation in CM, setting LDES Cap and Floor eligibility criteria, and raising termination fees by 30% or simplifying to single £45,500/MW fee. Multiple Price Capacity Market eligibility tightens with higher CapEx thresholds and disconnection certificate requirements.

CMP466 enables generators to recover costs of providing Electromagnetic Transient (EMT) models required under Grid Code GC0168. The modification follows after CMP456 and addresses the financial burden placed on existing generators, particularly older plant with complex systems. CUSC Panel initially rejected urgency but assigned high priority status on 5 February 2026.

DESNZ reviews the 2011 CO2 storage infrastructure access regulations to support CCUS market development. The consultation examines whether third-party access rules need updating to reflect current policy and support first-of-a-kind CCUS projects. This follows government commitments to establish industrial carbon capture clusters.

DESNZ proposes policy actions to maintain gas system security during energy transition, including infrastructure capacity requirements, resilience measures, and commercial model changes for LNG terminals, interconnectors, and storage. The consultation covers maintaining peak-day capacity and ensuring infrastructure remains commercially viable as gas demand declines. This follows the June 2025 commitment to public engagement on gas system transition.

DESNZ consults on operational cost budgets for LCCC and ESC covering 2026/27 to 2028/29, with resulting levy rates to be applied to electricity suppliers. The consultation seeks views on administrative costs for running CfD and capacity market settlement functions. Costs are recovered through levies on licensed electricity suppliers who pass them to consumers.

DESNZ proposes expanding the UK Emissions Trading Scheme to cover a share of emissions from international maritime voyages to and from UK ports. The consultation seeks views on scheme scope, cap adjustment mechanisms, future IMO alignment, and impacts. This follows generally supportive responses to November 2024 maritime ETS expansion proposals.

NESO proposes increasing minimum reactive power requirements for full converter technology Power Park Modules operating below maximum active power output through Grid Code modification GC0184. The Grid Code Review Panel rejected the proposal on 13 November 2025, stating it did not identify a clear defect. The proposer is considering next steps.

NESO proposes reviewing voltage limits that apply during operational timescales and introducing flexibility around these constraints. The modification affects transmission owners, NESO, distribution networks, generators, and directly connected customers. Cross-code changes to Grid Code and STC may be required.

DESNZ proposes urgent changes to Capacity Market Rules regarding locational changes of capacity units, requiring rule modifications as soon as possible. The consultation aims to enhance scheme functionality and strengthen delivery assurance. This follows a separate broader consultation on Capacity Market Rules published recently.

DESNZ proposes switching from RPI to CPI for inflation indexation of Renewable Obligation buy-out prices and Feed-in Tariff payments. CPI typically runs 0.5-1 percentage point below RPI over time. The change would reduce annual uplifts for both schemes, affecting existing contract holders.

Government proposes switching inflation indexation for Renewables Obligation buy-out prices and Feed-in Tariff rates from RPI to CPI. Both schemes use inflation adjustments to maintain real value of payments over time. The change would reduce annual increases since CPI typically runs 0.5-1 percentage point below RPI.

Ofgem approved CMP463, freezing Specific Onshore Expansion Factors at 2025/26 levels from 1 April 2026. The modification prevents large unexpected increases in these TNUoS charges that would have resulted from the 2026 Price Control. The freeze is temporary, pending a fundamental TNUoS review.

DESNZ proposes changes to Capacity Market prequalification rules for the 2026 auction, aiming to align the scheme with decarbonisation goals and improve functionality. The consultation covers reforms to existing market rules that determine which capacity providers can participate and under what terms. Specific changes are not detailed in the summary provided.

DESNZ seeks views on allowing hydrogen-to-power generation into the Capacity Market and on revising interconnector de-rating factors. The consultation runs through early 2026 with decisions expected before the next capacity auction. This would expand the technology mix eligible for capacity payments beyond current fossil and renewable generators.

NESO now publishes real-time reserve availability and utilisation prices for non-balancing mechanism services through its Open Balancing Platform. Quick Reserve service data is live, with Slow Reserve data to follow when that service launches. This creates transparency on ancillary service costs and provider behaviour previously hidden from the market.

DESNZ proposes reforms to the Clean Industry Bonus (CIB) for CfD Allocation Round 8, introducing workforce protection and skills investment criteria, extending eligibility to onshore wind, and implementing technical improvements. The CIB provides additional revenue to renewable projects that meet domestic supply chain requirements. The consultation seeks views on these changes ahead of AR8.

DESNZ seeks evidence on coordinating smart meter installations with low carbon technology deployments to reduce field capacity constraints and improve consumer experience. The call for evidence focuses on installation efficiency, field capacity constraints in certain locations, and local coordination opportunities in areas with low smart meter penetration. No specific mechanisms or changes are proposed.

NESO proposes to socialise transmission connection asset costs and cap customer contributions through CUSC modification CMP460. The modification seeks to create more certain charging by reducing direct customer charges for connection infrastructure. Workgroup consultation runs 28 January to 18 February 2026.

DESNZ consults on transitioning carbon capture, utilisation and storage networks from government-led development to market-led operation. The consultation seeks industry views on challenges hindering CO2 transport and storage network commercialisation. No specific timeline or cost allocation mechanisms are detailed.

DESNZ proposes to transfer governance of technical and security standards for smart energy devices from government to industry-led arrangements under Elexon's management through Balancing and Settlement Code modifications. The governance would manage requirements for domestic EV chargers, heat pumps, and other flexibility devices. Costs would be recovered through BSC levies on industry participants.

Ofgem opens review of energy system cost allocation and recovery, examining how network, wholesale, policy, and retail costs are recovered from domestic and non-domestic consumers. The review considers alternatives to current standing charge structure, including block tariffs, time-of-use charging, location-based pricing, and ability-to-pay options. Consultation closes 24 September 2025 with policy options expected end-2025.

DESNZ launches consultation on improving visibility of distributed energy assets including EV chargers, solar panels, heat pumps and batteries through better data collection from installation to operation. The consultation seeks views on strategic data flows and options for mandating asset registration. No specific mechanisms or costs are proposed at this stage.

NESO is revising the Obligatory Reactive Power Service (ORPS) compensation methodology through CUSC modification CMP457, moving away from gas price-based rates. The Standard Governance workgroup process begins after 13 November 2025, following unanimous CUSC Panel approval in October. Current ORPS costs reflect gas prices despite the shift to low-carbon generation requiring grid stability services.

NESO introduces Grid Code modification GC0183 requiring generators and interconnectors to notify their intended availability during severe space weather events. Ofgem approved the modification on 20 November 2025 with implementation on 4 December. The modification proceeded through urgent procedures due to national security implications.

DESNZ consults on streamlining land rights and consents processes for electricity network infrastructure to enable faster deployment. The consultation follows a 2022 call for evidence and targets reducing costs, complexity and delays that currently hinder network projects. Minor changes to existing infrastructure will be fast-tracked to free resources for complex cases requiring detailed scrutiny.

DESNZ proposes updates to technical guidance for assessing wind turbine noise emissions, which local authorities use to evaluate onshore wind planning applications. The guidance aims to align with current evidence, turbine technology developments, and noise assessment methodologies. No specific noise thresholds or assessment parameters are detailed in this preliminary notice.

CMP456 creates a cost recovery mechanism for generators required to produce Electro Magnetic Transient (EMT) models under GC0168, shifting the financial burden from plant operators to system users. The modification addresses 'significant' costs imposed on older generators with multiple discrete systems who gain no direct benefit from producing these grid stability models. Authority rejected urgent processing in December 2024, with the CUSC Panel designating this high priority in January 2025.

DESNZ consults on drafting changes to CfD Standard Terms and Conditions to allow unconsented fixed-bottom offshore wind projects to bid in Allocation Round 7. The changes would relax eligibility requirements that currently require projects to have consents before bidding. AR7 is scheduled to open in summer 2025.

DESNZ proposes mandatory community benefit funds for low carbon energy infrastructure, requiring developers to provide monetary or in-kind contributions to local communities. The scheme would require primary legislation to grant regulation-making powers. Separately, the consultation reviews whether to exercise existing powers in the Infrastructure Act 2015 to mandate community shared ownership of renewable projects.

DESNZ commissioned an independent review of greenhouse gas removals (GGRs), including BECCS and DACCS, to assess how these technologies can help meet net zero targets by 2050. Dr Alan Whitehead chairs the review, which includes stakeholder roundtables and a public call for evidence. The review will produce recommendations for government consideration, but government will not respond to individual submissions.

DESNZ consults on mandating solar canopies on new outdoor car parks above an unspecified size threshold, covering public and private sites. The consultation also seeks views on expanding permitted development rights for EV charging infrastructure to reduce planning barriers. The solar mandate would apply to new car parks, with exploration of retrofitting existing facilities.

DESNZ and Ofgem propose standard licence conditions for code managers and update CMA appeals process following Energy Act 2023. Code managers will replace industry panels with licensed entities that set budgets, recommend modifications to Ofgem, and align codes with Ofgem's Strategic Direction Statement. Appeals trigger when Ofgem disagrees with code manager recommendations, replacing current panel-based triggers.

CMP453 proposes to charge BSUoS on net rather than gross flows for BSC Trading Units, meaning customers who export more than they import would not pay system balancing costs. The CUSC Panel recommended the change by majority on 31 October 2025, with the Final Modification Report sent to Ofgem on 11 November 2025. The modification follows Standard Governance through a Workgroup process.

DESNZ consults on revenue support regulations for Greenhouse Gas Removals and Power Bioenergy with Carbon Capture and Storage, covering contracting procedures, information publication, counterparty functions, and eligibility criteria. The consultation targets project developers, carbon market participants, and investors. This follows the government's broader CCUS and negative emissions strategy but provides implementation detail rather than policy direction.

DESNZ is revising National Policy Statements EN-1, EN-3, and EN-5 to align with Clean Power 2030 targets, including bringing onshore wind back into the Nationally Significant Infrastructure Projects regime. The consultation on material changes runs until 23 June 2025. These NPSs guide Planning Inspectorate decisions on major energy infrastructure applications.

DESNZ seeks technical evidence on hydrogen-to-power projects that can deploy by 2030 without large-scale hydrogen infrastructure. The consultation targets developers with existing H2P deployment plans. No policy changes or funding commitments are proposed — this is information gathering for future policy development.

GC0178 seeks to specify limits on temporary overvoltage events and clarify generator obligations during such events. The modification is proceeding through Standard Governance and has been paused to allow appointment of a consultant to scope the work. High impact parties include generators, transmission owners, and interconnectors.

DESNZ seeks views on supporting oil and gas sector transition in the North Sea, framed as a 'managed transition' rather than immediate cessation. The consultation addresses how to balance existing hydrocarbon extraction with offshore wind development using the same seabed and infrastructure. No specific mechanisms or cost allocations are detailed in this initial announcement.

DESNZ proposes relaxing CfD eligibility to allow offshore wind projects without full planning consent to bid in AR7, opening summer 2025. The consultation considers extending CfD contract terms beyond the current 15 years and giving the Secretary of State greater visibility over sealed bid information to set budgets. AR7 budget allocation will use different criteria for fixed-bottom offshore wind.

The UK ETS Authority proposes extending the emissions trading scheme beyond its current 31 December 2030 expiry into a Phase II from 1 January 2031. The consultation considers whether to allow banking of emissions allowances between phases and the duration of Phase II. This continues the existing carbon pricing framework that affects all fossil fuel generators in the power sector.

DESNZ opens consultation on National Policy Statement EN-7, which will set planning policy for nuclear power stations deploying after 2025. The NPS replaces outdated planning guidance and determines how Planning Inspectorate assesses Development Consent Orders for new nuclear projects. This affects all nuclear development beyond current committed projects like Hinkley Point C and Sizewell C.

DESNZ proposes a Smart Data scheme allowing customers to share energy consumption data with authorised third parties for tariff comparison and personalised services. The consultation seeks views on scope, governance, and implementation design. No specific timeline or regulatory framework is outlined.

NESO proposes Grid Code changes to replace Mandatory Frequency Response (MFR) with a new Real-time Dynamic Regulation service from 2026/27. The two products will run in parallel until 2029 before MFR is phased out. The Panel rejected the initial proposal in March 2026 for lacking clarity on defect and scope.

DESNZ launches a review of Ofgem's role and powers, citing consumer protection concerns and the need for higher standards in energy markets. The review will examine the regulator's functions and delivery mechanisms. No specific timeline or scope limitations are provided.

NESO releases a new dataset calculating skip rates per 30-minute period using methodology developed with LCP Delta. The data shows skip rates following each stage of exclusions as set out in their published methodology. The dataset is accompanied by an online dashboard for market participants.

DESNZ consults on adjusting free carbon allowances for industrial sectors under UK ETS, focusing on carbon leakage calculations and border adjustment impacts. The consultation proposes changes to how the Carbon Leakage List is calculated and how free allocations adjust when EU's Carbon Border Adjustment Mechanism affects UK industries. This follows a 2023 review that committed to publishing a draft leakage list.

DESNZ proposes changes to Capacity Market rules to improve demand side response (DSR) participation and delivery assurance. The consultation covers DSR technology categorisation and testing processes. The proposals aim to better integrate consumer-led flexibility within existing capacity procurement.

Ofgem consults on draft guidance for AI deployment across energy sector operations, covering safety, security, fairness and sustainability criteria. The guidance aims to streamline regulatory compliance by mapping AI use cases to existing regulatory frameworks rather than creating new rules. Consultation runs until spring 2025 with regulatory laboratory sessions in February.

The UK ETS Authority proposes expanding the emissions trading scheme to cover maritime sector from 2026, applying carbon pricing to shipping fuels that currently do not reflect environmental costs. The consultation covers scope definitions, cap adjustments, operator requirements, and potential future expansion to international routes. Maritime operators would need to purchase allowances for their emissions, creating a direct carbon cost.

The consultation proposes allowing UK ETS operators to deduct CO2 from their allowance obligations when it is permanently stored via non-pipeline transport (road, rail, ship). This enables facilities without pipeline connections to access geological carbon storage while receiving ETS credits. The framework would regulate transport emissions and intermediate storage sites.

DESNZ proposes additions to CfD contracts to enable the Clean Industry Bonus mechanism, which provides extra revenue to offshore wind projects that meet supply chain sustainability criteria. The draft contract terms set out notice requirements, payment terms, and performance-related adjustments for non-delivery. The bonus operates within the existing CfD structure rather than as a separate support mechanism.

DESNZ launches the CfD Clean Industry Bonus, which provides additional revenue support to fixed and floating offshore wind projects that invest in more sustainable supply chains. The mechanism operates as an add-on to existing CfD payments, with details available on a dedicated microsite.

NESO formalises a Demand Control Rotation Protocol allowing rolling blackouts for 3-24 hours during supply shortfalls, modifying Grid Code OC6. The modification affects Distribution Network Operators, NESO, and consumers, with cross-code impacts on the Distribution Code. Panel recommendation has been deferred to address Load Lock definition issues with the Energy Network Association.

CMP445 proposes to pro-rate first-year TNUoS charges for generators from their charging date rather than charging the full annual amount upfront. The modification was denied urgent treatment by the Authority in December 2024 and is proceeding through standard governance, with workgroup consultation closing 22 August 2025. The CUSC Panel placed this high on their prioritisation stack in March 2025.

DESNZ proposes reforms to Scotland's electricity infrastructure consenting under the Electricity Act 1989, targeting projects over 50MW onshore and 1MW offshore within 12 nautical miles. The consultation seeks to modernise consent processes and strengthen community involvement requirements. Both UK and Scottish governments agree that removing inefficiencies from the 1989 Act is the primary route to accelerating deployment for Clean Power 2030.

DESNZ proposes changes to the Capacity Market to maintain security of supply while enabling unabated gas plants to decarbonise. The consultation combines proposals for rule changes with a call for evidence on future market design. No specific mechanisms or parameters are detailed in this announcement.

CMP442 allows generators to fix their TNUoS charges against NESO's forecasted tariffs, converting variable transmission charges into predictable costs. The modification follows standard governance through workgroup process, with first workgroup meeting planned for 16 December 2024. CUSC Panel initially prioritised this as high but downgraded to medium priority in February 2025 following Ofgem's transmission charging modification prioritisation guidance.

CMP441 proposes to align the timing for de-energising non-embedded hydrogen electrolysers with embedded ones, addressing a credit risk discrepancy. The modification was unanimously recommended by the CUSC Panel in December 2024 but was sent back by the Authority in July 2025 for reconsideration. The Panel has now deprioritised it to low priority status.

DESNZ will publish AR6 CfD allocation results on 3 September 2024, following National Grid ESO notification to applicants. The bulletin provides administrative details about stakeholder mailing list management and GDPR compliance.

Ofgem finalises guidance requiring NESO to produce strategic 'Future Energy Pathways' instead of illustrative scenarios, with pathways showing what must happen to meet net zero by 2050. The guidance mandates whole-system modelling including gas constraints, network limitations in the short term, and granular regional data. NESO must publish major pathways every three years to inform the Centralised Strategic Network Plan, with methodology subject to Ofgem approval.

The sealed bid window for AR6 CfD allocation has closed and NESO will run the auction process. Results will be notified to applicants on 3-4 September 2024, followed by public release on GOV.UK. The allocation process will be followed by an independent audit.

National Grid ESO has opened the sealed bid window for CfD Allocation Round 6, running from 5-9 August 2024. This follows the formal notice of auction being issued to qualifying applicants.

The government increased AR6 CfD budget to over £1.5 billion, up 50% from the March allocation. Offshore wind receives £1.1 billion (£300m increase), established technologies get £185m (£65m increase), and floating offshore wind and emerging technologies receive £270m (£165m increase) including £15m ringfenced for tidal stream.

Ofgem has completed the appeals process for CfD Allocation Round 6, notifying applicants of final outcomes on their eligibility challenges. Projects that remained non-qualifying after National Grid ESO's initial review could appeal to Ofgem. The process now moves to scenario 5 in the AR6 timeline.

NESO publishes 0-14 day ahead wind forecasts for all wind farms providing real-time operational metering data. Forecasts use evaluated operational capacity based on recent actual production levels from SCADA telemetry rather than nameplate capacity. The dataset covers both national and individual wind farm level predictions.

AR6 CfD allocation round extends to maximum timeline (scenario 5) after Ofgem received appeals from non-qualifying applicants between 12-18 June. Ofgem will consider appeals until 24 July 2024, with ESO observations due by 26 June.

AR6 CfD allocation round runs to timeline scenario 3 after one or more non-qualifying applicants requested review by 28 May 2024. National Grid ESO will complete reviews by 11 June 2024. General election on 4 July 2024 may affect timeline for round conclusion scheduled for summer.

DESNZ proposes integrating greenhouse gas removals (GGRs) into the UK Emissions Trading Scheme, allowing carbon removal credits to offset emissions within the carbon pricing system. The consultation covers engineered removals and potentially nature-based solutions, with decisions on cap policy, allowance design, and permanence requirements. This extends the UK ETS beyond direct emissions to include negative emissions technologies.

DESNZ proposes expanding the UK ETS to cover waste incineration facilities, adding carbon costs to energy-from-waste operations. The consultation closes 2 August 2024 and seeks views on scope, thresholds, monitoring requirements, and cap adjustments. This affects waste-to-energy plants that generate electricity as a byproduct of incineration.

DESNZ begins scoping for a new Fusion Energy National Policy Statement to streamline planning consent for commercial fusion facilities. This is the first of two consultations, focusing on policy approach before drafting the actual NPS. The consultation runs for 8 weeks from May 2024.

NESO proposes requiring Transmission Owners to provide detailed Electromagnetic Transient (EMT) and Root Mean Square (RMS) models for grid stability analysis as inverter-based resources replace synchronous generation. The modification addresses control interaction risks and oscillation threats from the changing power system characteristics. Workgroups are paused pending approval of related CUSC modification GC0168.

NESO releases historical and forecast profile dates used to convert Cardinal Point forecasts into half-hourly demand forecasts from 2018 to 14 days ahead. Profile dates match forecast dates based on weather, embedded generation, seasonal patterns, and special events. These dates update as weather forecasts improve closer to real time.

The CfD AR6 application window closed on 19 April 2024, with National Grid ESO now reviewing submitted applications against qualification criteria until 20 May 2024. This is a routine procedural update on the allocation round timeline.

OpTIC replaces the Transport component of TNUoS with an economic market model that creates transmission charges based on assumed optimal network investment in a zonal market structure. The proposal aims to charge generators and suppliers as if they operated in a zonal wholesale market rather than the current uniform pricing system. Workgroup activity starts Spring 2025 after the CUSC Panel prioritised it as Medium.

DESNZ proposes rule changes to prevent emissions verification deadlines from reducing Capacity Market auction liquidity. The changes include conditional deadline extensions for generators required to submit verified emissions declarations at prequalification. This addresses administrative bottlenecks that could force viable capacity out of auctions due to paperwork delays rather than economic merit.

Ofgem launched a call for input on AI use in the energy sector, seeking views on how AI should be deployed responsibly to encourage innovation while managing risks. The consultation closed on 17 May 2024 and forms part of Ofgem's response to government AI regulatory principles. This represents regulatory guidance development rather than rule-making.

Ofgem summarises stakeholder responses to its proposal for a Future Regulation Sandbox (FRS), a new policy instrument to test regulatory changes before implementation. The FRS would complement existing innovation tools including the Energy Regulation Sandbox, Fast Frank Feedback, and Strategic Innovation Fund. This is not a decision document but sets out next steps based on feedback received.

Ofgem launches a call for input on AI use in the energy sector, proposing regulatory guidance and collaboration frameworks rather than new rules. The regulator concludes existing regulation is adequate to capture AI use but wants to produce risk-based guidance tools. Responses close after an unspecified consultation period.

The RO scheme issued 108.3 million certificates in 2022-23, supporting 80.3 TWh of renewable generation equivalent to 31.8% of UK electricity supply. Suppliers presented 107.7 million ROCs (88.4% of obligation) and paid £748.6 million in buy-out funds to cover the shortfall. The scheme transferred approximately £6.4 billion from electricity bills to renewable generators through certificate values of £59.76 each.

Ofgem and DESNZ propose new licences for the National Energy System Operator (NESO), which will combine electricity system operation and gas system planning functions. NESO will hold both an Electricity System Operator licence and a Gas System Planner licence when designated as the Independent System Operator and Planner (ISOP). The consultation also proposes modifications to transmission, distribution, generation, supply, interconnector, smart meter communication, and gas transporter licences to accommodate NESO's expanded role.

Ofgem classified transmission assets for the HND South Cluster following National Grid ESO's impact assessment. The decision determines which assets are regulated under different frameworks, affecting cost recovery mechanisms for offshore transmission infrastructure. This follows the established Offshore Transmission Network Review framework for asset classification.

The sixth CfD allocation round opened on 27 March 2024. The notice provides only administrative details about the round opening and mailing list management. No specific auction parameters, budget figures, or technology-specific changes are disclosed.

Ofgem approves revisions to the Relevant Balancing Services Guidelines proposed by the Capacity Market Delivery Body for 2024. The decision letter outlines which specific changes have been accepted to the technical guidelines that determine which balancing services are relevant for capacity market participation.

Ofgem approves BSC Modification P451, updating Black Start provisions and compensation arrangements in the Balancing and Settlement Code. The modification changes how backup power restoration services are procured and paid for when the grid fails. This is a technical update to existing emergency procedures rather than a structural reform.

Ofgem has summarised responses to its October 2023 open letter on regulating independent distribution network operators (IDNOs) and set out priorities for reviewing these arrangements. The document packages stakeholder feedback into themes and establishes the regulator's agenda for potential reforms to IDNO regulation. This follows concerns about IDNO operating standards and customer service compared to traditional distribution network operators.

Ofgem announces the repayment of excess funds collected during the Offshore Transmission Tender Round 6 (TR6) aggregation exercise. The authority has decided how to return overpayments made by offshore wind developers for transmission assets. This is an administrative outcome following the TR6 procurement process.

Ofgem has approved CMP427, introducing a landowner Letter of Authority requirement for new onshore transmission connection applications under the Connection and Use of System Code (CUSC). The change takes effect from 28 March 2024. This adds a documentation requirement to the application process rather than changing substantive connection terms or costs.

Ofgem mandates Data Best Practice (DBP) Guidance integration into industry codes, targeting Central System Delivery Bodies, Code Panels, Code Administrators, and licensed entities. The guidance aims to surface, share, and make interoperable data held across the energy sector. Entities handling significant data portions face specific implementation expectations.

DESNZ finalises AR6 contract changes, barring generators supplying offshore oil and gas facilities from Private Network CfD agreements. The Milestone Delivery Date definition expands to allow extensions when Ministry of Defence radar interference mitigation confirmation is delayed. For AR7, the Sustainable Industry Reward becomes a competitive process six months before the main auction, offering extra revenue for UK supply chain investment or sustainable production methods.

DESNZ launches second REMA consultation with narrowed options for fundamental electricity market redesign. The consultation runs until May 2024 and follows the first consultation's identification of market failures in current arrangements. This represents the most significant potential reform to GB electricity markets since BETTA, with options including central dispatch, locational pricing, and enhanced market-based coordination.

DESNZ proposes amending the CfD supplier obligation regulations to enable the electricity supplier levy to fund Dispatchable Power Agreements (DPAs) for power CCUS projects. The amendment would use the existing CfD cost recovery mechanism to collect payments for a new support scheme targeting gas generation with carbon capture. This extends the supplier obligation beyond its original CfD remit.

DESNZ extends the consultation response deadline for Allocation Round 7 CfD amendments from 7 March to 11 March 2024. The extension follows the earlier-than-usual publication of AR6 statutory notices, which affected internal sign-off procedures for consultation responses. The consultation content remains unchanged.

Government sets £1 billion budget for CfD Allocation Round 6, the largest allocation round budget to date. The budget was announced in the Chancellor's Spring Budget on 6 March 2024. AR6 will support renewable energy projects through strike price guarantees.

Grid Code modification GC0168 will require certain generators and network operators to provide electromagnetic transient (EMT) models to NESO for analysis of system stability as inverter-based resources displace synchronous generation. The modification follows standard governance through a workgroup process, with high impact on generators, transmission operators, distribution networks, interconnectors and transmission owners. Timeline has been repeatedly delayed, with workgroup report submitted June 2025 but Panel requesting further legal text review.

Ofgem determinations on Tier 2 Capacity Market disputes for delivery year 2023-24. Resolves contested penalty or non-delivery charges against CM agreement holders.

Ofgem's initial project assessment of Offshore Hybrid Asset pilot projects. OHAs combine offshore wind connections with interconnector functionality, allowing cross-border power flows on the same infrastructure.

DESNZ launches a call for evidence on hydrogen and CCUS supply chains under the £960 million Green Industries Growth Accelerator fund. The consultation seeks input on manufacturing capacity and supply chain bottlenecks in these sectors. GIGA forms part of a wider £4.5 billion manufacturing package targeting strategic clean energy sectors.

NESO publishes daily forecasts of balancing reserve requirements for its 08:15 auction that procures firm positive and negative reserve from BM units for delivery between 23:00 same day and 23:00 next day. The dataset includes both medium-term approximations and detailed daily forecasts refined with wind and solar data, providing half-hourly volume requirements for each service window. Data is overwritten daily with previous entries archived, and all forecasts published after 27 February are live demand forecasts.

National Grid ESO published AR6 guidance covering application processes, common errors, and allocation methodology. AR6 opens for applications on 27 March 2024. The bulletin also contains standard GDPR compliance information for the stakeholder mailing list.

DESNZ opens the registration window for AR6, the sixth CfD allocation round, with applications opening 27 March 2024. Companies must register with National Grid ESO before applying for contracts. This is a routine administrative step in the quarterly CfD allocation cycle.

DESNZ announces an online event on 22 February 2024 to brief prospective applicants on Allocation Round 6 of the CfD scheme, which opens for applications on 27 March 2024. The event runs from 10am to 1.30pm and covers round overview, contract terms, and allocation process. Registration closes 20 February at 12pm with advance questions accepted until 15 February.

DESNZ proposes a transitional support mechanism for large-scale biomass generators converting to BECCS, covering gaps between existing support ending and future BECCS contracts beginning. The mechanism would apply in specific circumstances where generators face interim periods without revenue support. No details provided on mechanism design, duration, or funding source.

DESNZ published the Exemptions Request Notice for CfD Allocation Round 6, setting out procedures for excluded generators to apply for exemption from temporary site exclusion. Generators must follow specific procedures to become eligible for AR6, which opens in March 2024. The Low Carbon Contracts Company maintains the Register of Temporary Site Exclusion.

DESNZ opens consultation on CfD scheme amendments for Allocation Round 7 (opening 2025) and future rounds. Key AR7 proposals include enabling onshore wind repowering projects to bid, extending phased CfDs to floating offshore wind, and streamlining appeals processes. Longer-term considerations cover floating wind foundation innovation support, offshore transmission coordination, and inflation indexation updates.

DESNZ has opened consultation on contract drafting amendments to CfD Standard Terms and Conditions and Private Network CfD Agreement for the sixth allocation round opening March 2024. The consultation closes 30 January 2024. This affects contract terms that generators will sign following successful bids in AR6.

DESNZ issued a survey seeking feedback on whether to hold an in-person engagement event for CfD Allocation Round 6, with responses required by 5 January 2024. The previous two allocation rounds used remote engagement events. This is an administrative notice about event planning, not policy development.

DESNZ published AR6 parameters raising offshore wind strike prices and separating offshore wind into its own pot, alongside launching consultation on sustainable industry rewards for AR7. The ASP increases address the failed AR5 auction where no offshore wind projects bid. DESNZ also proposes additional CfD revenue for projects demonstrating supply chain sustainability from AR7.

DESNZ sets deadline of 27 November for developers to notify their intention to submit supply chain plans for CfD Allocation Round 6, with final submissions due 10 December. Assessment begins 11 December with feedback sessions scheduled for January 2024. The process uses Microsoft Teams for document submission and includes receipt confirmation within three days.

CMP423 proposes switching from a demand-weighted to generation-weighted Reference Node for TNUoS charging calculations. The CUSC Panel has recommended approval by majority, with the Final Modification Report sent to Ofgem on 9 December 2025. This changes how transmission charges are calculated and allocated across the network.

NESO publishes daily auction results for balancing services procured through the Enduring Auction Capability platform. The EAC platform now procures response services (Dynamic Containment, Dynamic Moderation, Dynamic Regulation) and reserve services (Balancing Reserve, Quicker Reserve). Historical results remain available through separate portals.

NESO's Grid Code modification GC0164 simplifies Operating Code No.2 to make obligations clearer for grid users. The modification has been under development since October 2023, with workgroup consultations completed and a second code administrator consultation closing March 2026. This is administrative restructuring of existing obligations rather than substantive rule changes.

DESNZ publishes results for CfD Allocation Round 5, with 95 clean energy projects securing contracts. The government also announces an indicative timeline for AR6, starting in six months, and publishes its response on non-price factors consultation.

CfD Allocation Round 5 sealed bid window closed, with National Grid ESO running the allocation process followed by independent audit. Results will be announced 7-8 September 2023 and published on GOV.UK. This is a routine procedural update on AR5 timing.

CMP419 proposes to revise generation transmission charging zones to include offshore wind farms connected under the Holistic Network Design, allowing these generators to pay wider transmission tariffs rather than local rates. The modification has been deprioritised from Medium-High to Low as of September 2025, with workgroup activity stalled since 2024. This follows Authority expectations from previous zoning decisions CMP324 and CMP325.

National Grid ESO has opened the sealed bid window for CfD Allocation Round 5, running from 9-15 August 2023. The auction notice has been sent to qualifying applicants who passed pre-qualification. This follows scenario five in the published AR5 timeline.

DESNZ increased the AR5 CfD budget by £22m to £227m total, allocating £20m extra to mature technologies in Pot 1 (now £190m) and £2m extra to emerging technologies in Pot 2 (now £37m). Pot 2 retains £10m ring-fenced for tidal stream projects.

DESNZ revised AR6 CfD supply chain plan scoring criteria to clarify what information constitutes 'comprehensive' supplier selection reasoning. The amendment changes Question 1.1 to require explicit procurement rationale including cost, technical considerations, and delivery feasibility. Maximum points available remain 45 for most technologies, 8 for floating offshore wind.

DESNZ has barred renewable generators supplying offshore oil and gas platforms from receiving CfD payments under Private Network agreements from AR6 onwards. The decision prevents consumer bills from subsidising renewable electricity delivered directly to offshore platforms. AR6 Supply Chain Plans and guidance are now available.

Ofgem's appeals review window for Allocation Round 5 has opened, triggering timeline scenario 5 which extends the auction process. The bulletin provides only procedural updates and GDPR compliance information for the CfD stakeholder mailing list.

LCCC published updated co-location guidance allowing CfD generators to co-locate with battery storage and hydrogen production facilities under existing contracts. The guidance clarifies permitted metering arrangements and configuration scenarios to support government targets of 1GW hydrogen by 2025 and 10GW by 2030. This implements existing CfD contract flexibility rather than changing the scheme structure.

AR5 CfD non-qualification review assessment window opens until 15 June 2023, with NESO assessing non-qualifying applications. This is a routine administrative step in the AR5 allocation round process.

DESNZ opened follow-up discussions with developers on its non-price factors consultation for CfD AR7 and beyond. AR5 applications closed on 24 April 2023, with assessment running until 24 May.

DESNZ opened a call for evidence on introducing non-price factors into CfD allocation, closing 22 May 2023. CfD Allocation Round 5 applications close 24 April 2023. The bulletin provides administrative updates on ongoing CfD processes.

CMP414 seeks to implement the workgroup solution from CMP330/CMP374 by updating CUSC transmission charging methodology. Ofgem rejected the initial proposal in July 2024 due to deficiencies, forcing reconvening of workgroups. The modification is now designated high priority with workgroups beginning October 2025.

CfD Allocation Round 5 opened for applications on 30th March 2023, closing on 24th April 2023. The bulletin provides a 25-day window for renewable generators to submit applications for strike price contracts. This represents routine operation of the established CfD allocation process.

DESNZ published a consultation on AR6 Supply Chain Plan questionnaire, running from 28 March to 2 May 2023. National Grid ESO published final guidance documents for CfD Allocation Round 5. The bulletin also requests feedback on a launch event held on 23 February 2023.

DESNZ confirmed a £205 million budget for CfD Allocation Round 5, with applications opening 30 March to 24 April 2023. The department published the final allocation framework, contract documents, and consultation response alongside the budget notice. This maintains the established CfD mechanism with unchanged fundamental structure.

DESNZ published materials from the CfD Allocation Round 5 launch event held on 23 February 2023, including slides, Q&A responses, and webinar recording. LCCC separately published guidance on applying for minor and necessary modifications to CfD Standard Terms. The EMR Delivery Body scheduled an AR5 application readiness webinar for 22 March 2023.

DESNZ announces Allocation Round 5 launch event for 23 February 2023, ahead of the round opening in March 2023. This marks the first annual CfD round following Round 4's success in 2022. The online event includes presentations from delivery partners and Q&A, with registration required by 22 February.

National Grid ESO opens registration for CfD Allocation Round 5, allowing renewable generators to register for the competitive auction process. The registration window provides access to guidance and support materials through the EMR Delivery Body Portal. This is a routine administrative step preceding the main AR5 allocation process.

DESNZ published the Exemptions Request Notice for CfD Allocation Round 5, setting procedures for generators to request exemption from temporary site exclusions. The round opens in March 2023, with exemption requests required by a specified deadline to remain eligible. Sites currently excluded are listed on the LCCC website.

DESNZ opened a consultation on proposed changes to CfD Standard Terms and Conditions for Allocation Round 5, covering six areas of contract adjustments. Changes include clarifying generator flexibility on start date delays, simplifying data requirements, updating Private Network Agreement definitions, revising interest rate calculations post-Brexit, removing BSUoS charge clauses following Ofgem's decision to stop levying these on generators, and adding supply chain plan requirements for floating offshore wind. The consultation closes 5 February 2023.

DESNZ published Allocation Round 5 parameters and a consultation on future CfD rounds. AR5 opens March 2023 with pot structure, Administrative Strike Prices, and delivery years now confirmed. The consultation on AR6 and beyond closes 7 February 2023.

DESNZ sets Supply Chain Plan application window for CfD Allocation Round 5 from 5-12 December 2022. Projects ≥300MW or floating offshore wind of any size must submit plans. Independent assessors will evaluate submissions with feedback sessions in January 2023.

CMP402 would modify CUSC Section 15 to implement Ofgem's October 2022 anticipatory investment principles for offshore generators connecting to shared transmission networks at different times. The modification has been deprioritised to low priority by the CUSC Panel as of September 2025, with no active workgroup meetings scheduled.

CMP405 proposes to separate TNUoS demand charges into year-round locational signals and peak security signals, charging storage that imports outside Triad periods while rewarding it during other times. The modification has been deprioritised as low priority by CUSC Panel despite proposer requests for urgency, with Ofgem rejecting urgent treatment in January 2025. Panel confirmed low priority status in March and September 2025, effectively stalling progress.

NESO proposes reviewing restrictions on loss of power infeed risk for offshore DC converter outages under SQSS modification GSR030. The modification has been in workgroup since October 2022, with the latest workgroup scheduled for March 2026. The proposal was split in November 2025, with defect 1 becoming separate modification GSR034.

DESNZ published a draft timeline for CfD Allocation Round 5, scheduled to begin March 2023. This implements the February 2022 commitment to run CfD auctions annually instead of every two years. The timeline remains indicative pending final confirmation.

CMP397 makes technical changes to CUSC exhibits to support CMP316's co-located generation rules. The modification received unanimous panel support in May 2024 and awaits Ofgem decision by September 2025. This is administrative housekeeping required to implement the substantive co-location framework.

DESNZ announced two seminars on CfD Supply Chain Plans for August and September 2022, covering the assessment process and questionnaire changes for AR5. The seminars target developers, suppliers and investors involved in CfD projects. Registration closes at 12pm on 19 August for the first session and 2 September for the second.

The fourth CfD auction allocated contracts to 93 projects totalling nearly 11GW of capacity, almost double the previous round in 2019. Offshore wind strike prices have fallen 70% since the first auction in 2015. Technologies included offshore wind, onshore wind, solar, and for the first time tidal stream and floating offshore wind.

NESO proposes reviewing demand connection criteria in the transmission network security standards (NETS SQSS) to align with distribution network security standard EREC P2/7. The review covers how embedded generation, demand side response, storage and active network management contribute to demand security. The workgroup process has been running since June 2022 with next meeting scheduled for March 2026.

DESNZ published a routine administrative notice about CfD stakeholder communications, including data protection requirements and mailing list management. The notice contains no policy content — only procedures for opting in and out of the CfD stakeholder contact list. An update on Allocation Round 4 progress was published separately on the dedicated microsite.

DESNZ published a routine administrative update directing CfD stakeholders to an Allocation Round 4 progress report on a separate microsite. The bulletin contains standard data protection notices for the CfD stakeholder mailing list.

DESNZ issued routine administrative notices for CfD Allocation Round 4, including a progress update and a webinar announcement on Initial Conditions Precedent scheduled for 7 July 2022. The bulletin provides no substantive policy or procedural changes to the CfD scheme.

Ofgem removes BSUoS charges from generators from 1 April 2023, shifting system balancing costs entirely to demand. CfD projects in Allocation Round 4 will have strike prices adjusted downward from that date to reflect the removal of this cost. The change implements code modification CMP308.

DESNZ issued an administrative bulletin updating the CfD Allocation Round 4 microsite. The bulletin consists entirely of data protection notices and contact list management instructions.

NESO publishes 4-day forecasts of Dynamic Containment requirements for frequency response services, using demand, inertia and loss forecasts. The methodology estimates both high and low frequency response volumes needed to secure the largest credible system loss. Actual day-ahead requirements may differ based on real-time optimisation and interconnector flow changes.

DESNZ issued a routine CfD stakeholder bulletin providing an update on Allocation Round 4 progress and requesting feedback on the AR4 microsite. The bulletin contains no substantive policy content or market changes. Survey responses are requested by 11 April 2022.

National Grid ESO completed qualification assessment for CfD Allocation Round 4 on 25 February 2022, with non-qualifying applicants having until 25 March to request review. If all applications qualify after review, sealed bid invitations will be issued by 5 April 2022. Appeals to Ofgem can be submitted 28 March to 1 April for upheld non-qualification decisions.

DESNZ published all five potential timeline scenarios for CfD Allocation Round 4 after stakeholder feedback. The qualification assessment window runs until 25 February 2022, when National Grid ESO will inform applicants whether they qualify to participate. Timeline after this point depends on whether any applications are rejected.

CfD allocation rounds will be held annually from March 2023, replacing the previous two-year cycle. The fifth allocation round will open in March 2023. The government made this decision following an internal review that concluded annual auctions accelerate deployment and increase market confidence.

DESNZ launched a consultation on technical changes to the CfD scheme for Allocation Round 5, focusing on strengthening Supply Chain Plan requirements and wider regulatory aspects. The consultation closes on 15 March 2022, with a parallel call for evidence on longer-term supply chain policy closing on 29 April 2022. This represents preparation for the next CfD round rather than immediate rule changes.

DESNZ announces a six-week consultation on technical changes to CfD scheme and Supply Chain Plan process for Allocation Round 5, launching in the next few weeks. A parallel 12-week call for evidence on longer-term Supply Chain Plan reforms will run alongside. Live Q&A session scheduled for 9 February 2022.

CfD Allocation Round 4 application window closed on 14 January 2022 with National Grid ESO now conducting qualification assessments until 25 February 2022. Non-qualifying applicants can request reviews from 28 February for five working days. This is a routine procedural update on an existing allocation round.

DESNZ opened CfD Allocation Round 4 to applications on 13 December 2021. The department clarified that flexible bids in AR4 may have different capacities and target dates from the original application, subject to existing regulations and allocation framework rules. The FAQ section was updated to remove ambiguity.

LCCC published guidance explaining how BSUoS charge removal would affect CfD Allocation Round 4 strike prices. If Ofgem implements CMP308 to remove BSUoS charges from generation, CfD strike prices would be adjusted downward to maintain generator revenues. The guidance provides worked examples for developers ahead of Ofgem's consultation closing 19 January 2022.

DESNZ published guidance for Allocation Round 4 of the Contracts for Difference scheme, with applications opening 13 December 2021 and closing 14 January 2022. The guidance consolidates final statutory notices including budget confirmation, allocation framework rules, and National Grid ESO technical requirements through a dedicated microsite. This is implementation detail for an already-decided auction round rather than new policy.

Grid Code modification GC0155 proposes to clarify fault ride through technical requirements for generators connecting to the transmission system. The modification has been in workgroup since February 2022 with multiple timeline extensions, now scheduled for early 2026. A cost-benefit analysis is required and the modification will be split into two parts, with a new modification on temporary over voltage expected in March 2025.

DESNZ confirms £285 million budget for CfD Allocation Round 4, launching 13 December 2021. The department published final statutory notices, allocation framework, contract documents and consultation responses. The round allocates long-term revenue support contracts for renewable generation projects.

DESNZ issued a routine administrative bulletin for CfD Allocation Round 4 stakeholders on 16 November 2021. The bulletin promoted launch event materials and reminded recipients about a National Grid ESO webinar on the AR4 application process scheduled for 17 November 2021.

National Grid ESO scheduled webinars for CfD Allocation Round 4 applicants and published draft guidance documents for comment by 15 November 2021. Government opened consultation on LCCC and ESC operational cost budgets for 2022/23 to 2024/25, with levies recovered through electricity supplier charges.

National Grid ESO opened registration for CfD Allocation Round 4, with applications scheduled to open on 13 December 2021. This is a routine administrative bulletin announcing the registration window for renewable developers.

DESNZ opened a consultation on further contract changes to CfD Standard Terms and Conditions for AR4, which opens 13 December 2021. The department also published the AR4 Exemptions Request Notice on 1 October, setting procedures for generators seeking exemption from temporary site exclusions.

DESNZ published a routine stakeholder bulletin for CfD Allocation Round 4, announcing an online launch event on 23 September 2021 and opening the Supply Chain Plan application window from 27 September to 3 October. Projects 300MW or over must submit a Supply Chain Plan to participate in AR4.

DESNZ sets a £265 million draft budget for CfD Allocation Round 4, the largest round to date targeting double the renewable capacity of Round 3. Applications open 13 December 2021, with offshore wind, onshore wind, solar, tidal, and floating offshore wind eligible to compete for 15-year price support contracts.

DESNZ published the timeline for CfD Allocation Round 4, with applications opening 13 December 2021 and closing 14 January 2022. The department provided both shortest and longest possible timescales for the round on a dedicated microsite.

DESNZ published its response to the eight-week Call for Evidence on renewable energy policy design that closed 8 March 2021. The response acknowledges that the CfD scheme faces procurement challenges requiring both short-term incremental improvements and longer-term structural changes. These longer-term changes will be considered as part of wider electricity market reform led by BEIS.

The government finalised the Supply Chain Plan questionnaire for CfD Allocation Round 4, simplifying questions and improving guidance clarity. New regulations came into force adding and removing eligible technologies, strengthening supply chain requirements, and extending delivery years for successful projects. AR4 opens in December 2021, aiming to secure double the renewable electricity capacity of the previous round.

DESNZ announces seminars on 13 and 30 July 2021 to explain Supply Chain Plan requirements for CfD applicants. The seminars cover application processes, monitoring, implementation assessment, and post-build reporting with pass/fail criteria. Government response to recent consultation on Supply Chain Plan questionnaire to be published shortly.

CMP375 proposes changes to how the Expansion Constant and Expansion Factors are calculated in TNUoS charging, affecting how transmission network investment costs are recovered from users. The modification received unanimous Panel support for the Original solution and majority support for WACM2 in January 2024. Ofgem's decision date has slipped repeatedly from September 2024 to February 2025, with the current expected decision date to be confirmed.

NESO publishes constraint breakdown data showing costs and volumes of transmission system actions taken by the ESO. The dataset provides transparency on why specific system actions were taken, with tags that can be retrospectively updated. Data covers transmission network constraints only.

NESO publishes methodology for measuring carbon intensity of balancing actions, comparing emissions from Final Physical Notices versus actual dispatch through Bid Offer Acceptances. The metric tracks how system balancing operations increase or decrease carbon intensity relative to generators' submitted schedules. Data covers dispatchable Balancing Mechanism units but excludes interconnectors and small BMUs.

NESO publishes operational metered wind output data by settlement period for Scotland, England and Wales. The data differs from settlement metering used in wind forecasting metrics due to pre-reconciliation timing. This provides real-time generation visibility for system operation.

DESNZ confirms CfD Allocation Round 4 will open in December 2021. The department also published its consultation response on Supply Chain Plans and contract changes. Both documents are available on the AR4 portal.

DESNZ launched a dedicated portal for CfD Allocation Round 4, centralising guidance, FAQs, and event registration for potential applicants. The portal provides information access and hosts a CfD masterclass webinar on 20 April 2021. This is administrative infrastructure for an existing process, not a policy change.

NESO publishes 14-day ahead wind forecasts at national and Balancing Mechanism Unit level, extending beyond their day-ahead wind forecasts. The forecasts use evaluated Operational Capacity based on recent actual production levels from SCADA telemetry. The data covers all wind farms contributing to NESO's day-ahead incentive wind forecasts.

DESNZ announces a virtual stakeholder event on 26 February 2021 to discuss its Call for Evidence on enabling a high renewable, net zero electricity system. The event runs 15:00-16:00 and aims to clarify questions before the consultation closes in two weeks. Responses will inform the design and evolution of renewable support schemes, particularly the CfD scheme.

DESNZ extended the deadline for responses to its call for evidence on 'Enabling a High Renewable, Net Zero Electricity System' by two weeks to 8 March 2021, citing coronavirus pandemic challenges. The call for evidence will inform the design of the fifth CfD allocation round and longer-term government support for renewable projects.

DESNZ published a consultation on a new Supply Chain Plan questionnaire that CfD applicants must complete, closing 11 March 2021. The department extended the deadline for the related consultation on Supply Chain Plan changes from 18 January to 28 January to allow stakeholders to review both together.

NESO publishes the TEC register showing which projects hold transmission entry capacity contracts to connect to the grid. From November 2025, the register will add a 'Gate' column distinguishing between Gate 1 and Gate 2 agreements under updated CUSC provisions. The register covers existing connections and the pipeline of future projects seeking transmission access.

NESO publishes a register of embedded generation projects in Scotland that are connected or contracted to connect. The register will add a 'Gate' column from 21 November 2025 to distinguish Gate 1 and Gate 2 agreements under the Connections Reform process. Capacity data currently shows aggregated figures across stages and technologies, creating potential duplicates.

Government confirms major changes to CfD scheme for Allocation Round 4, including a third offshore wind pot, administrative strike price for floating offshore wind, and extension of negative pricing rule to stop payments when day-ahead prices go negative. Coal-to-biomass conversion projects are excluded from future rounds. Second consultation runs until 18 January 2021 on implementation details.

DESNZ allowed electricity suppliers to defer part of their CfD obligation increases from Q2 2020 to Q2 2021 due to coronavirus measures. The amendment came into force on 8 July 2020, ahead of LCCC's quarterly reconciliation. This shifts supplier payment timing but does not change the total obligation amount.

NESO publishes System Operating Plans (SOPs) — real-time operational plans produced at demand peaks and troughs that show how the system operator will balance electricity supply and demand. The SOPs reveal expected actions in the balancing mechanism, reserve requirements, interconnector flows, and transmission constraints for each cardinal point throughout the day. This data release makes operational decision-making transparent to market participants who can see NESO's anticipated balancing actions hours ahead of real time.

Government amends CfD supplier obligation regulations to protect suppliers from 80% of COVID-19-driven cost increases (up to £100m loan) and defer full cost recovery by an additional quarter to Q2 2021. Regulations laid 4 June with Parliamentary approval expected before 9 July reconciliation process.

NESO publishes real-time instruction data for non-BM ancillary services including Fast Reserve, STOR, and RDP dispatch through its ASDP system. Data is published continuously throughout the day once service providers confirm instructions. Monthly files are created only when new instructions are dispatched for these MW services.

DESNZ extends the CfD Allocation Round 4 consultation deadline by one week to 29 May 2020, citing COVID-19 disruption. The consultation covers proposals including floating offshore wind definitions, delivery year simplification, and Supply Chain Plan strengthening. AR4 remains scheduled to open in 2021 with draft parameters to be published 4-6 months beforehand.

CMP344 fixes transmission owner revenue recovery at the start of each price control period rather than allowing annual adjustments. The modification prevents mid-period revenue changes that currently create unpredictable cost shifts between network users. After multiple Ofgem send-backs since 2021, the CUSC Panel recommended implementation in June 2025, with final decision expected from Ofgem.

BEIS proposes deferring part of electricity suppliers' CfD obligations from Q2 2020 to Q1 2021 while providing a loan to LCCC to maintain generator payments during COVID-19. The consultation closes 19 May 2020 with Parliamentary approval required before 9 July for the reconciliation process. If the proposal fails, suppliers face higher lump sum payments in July's reconciliation.

NESO publishes regional carbon intensity forecasts covering 17 GB regions up to 48 hours ahead, using machine learning to predict demand, generation by fuel type, and power flows between regions. The methodology accounts for transmission losses, interconnector imports, and embedded wind/solar generation within Distribution Network Operator boundaries. Forecasts update every 30 minutes using real-time weather data from the Met Office.

BEIS provides a temporary loan to Low Carbon Contracts Company to cover CfD payments in Q2 2020 after COVID-19 reduced electricity demand and supplier levy contributions. The loan defers supplier payment obligations from Q2 2020 to Q1 2021 through regulatory changes subject to consultation. LCCC will not increase the Interim Levy Rate or Total Reserve Amount for Q2 2020 as previously warned.

DESNZ announces three online webinars for the CfD Round 4 consultation between 30 April and 6 May 2020. Sessions separate established technologies (onshore wind, solar, hydro) from less-established ones (offshore wind, remote island wind, advanced conversion). The consultation closes 22 May 2020.

DESNZ confirms the CfD AR4 consultation will close on 22 May 2020 as scheduled despite COVID-19, with AR4 planned to open in 2021. The department will replace physical stakeholder events with online webinars in late April or early May. Stakeholders can request extensions if COVID-19 prevents response.

CMP341 would create a sandbox for parties to trial innovative technologies by being derogated from specific CUSC obligations on a small-scale, time-limited basis. The proposal has been parked at low priority since 2020 and remains stalled with no active work. The CUSC Panel confirmed in February 2025 it will not prioritise this modification.

GC0140 proposes a Grid Code sandbox allowing parties to be exempted from specific Grid Code obligations for small-scale, time-limited trials of innovative technologies and services. The modification has been in a workgroup since 2020 but remains deprioritised, with meetings subject to Panel prioritisation as of February 2022. It follows standard governance procedures and has cross-code implications through CUSC modification CMP341.

NESO published historical carbon intensity data from January 2009 onwards, measuring CO2 emissions per kilowatt hour of electricity generation. The dataset uses seasonal decomposition to correct for missing or irregular data points and remains subject to ongoing data cleansing.

BEIS opened a twelve-week consultation on proposed amendments to the CfD scheme ahead of Allocation Round 4, scheduled to open in 2021. The consultation runs until 22 May 2020. AR4 will include auctions for both Pot 1 (established technologies like onshore wind and solar) and Pot 2 (emerging technologies like offshore wind and floating solar) technologies.

NESO publishes half-hourly BSUoS charges across three run types (Interim Initial, Settlement Final, Reconciliation Final) with daily updates of actual prices and volume data. A system outage paused billing from 26 April to 27 May 2024, with normal publication resuming 28 May 2024. The data provides visibility into balancing service costs allocated to suppliers and generators.

NESO publishes daily and weekly forecasts of Negative Reserve Active Power Margin (NRAPM), warning when insufficient flexibility exists to balance the system during low demand periods. The forecasts cover 2-14 days ahead daily and 2-52 weeks ahead weekly for both national and Scottish systems. NRAPM warnings indicate risk of Emergency Instructions being issued to generators.

CMP330/CMP374 proposes to allow transmission-connected parties to build their own connection assets longer than 2km, where previously only assets up to 2km could be built contestably. The modification removes the arbitrary 2km length restriction on contestable connection works, requiring only agreement between the transmission owner and connecting party. Decision expected but currently delayed pending resolution of related modifications CMP414 and CM079.

NESO publishes Balancing Services Adjustment Data (BSAD) covering balancing actions taken outside the standard balancing mechanism, updated twice daily. The dataset tracks actions that affect imbalance settlement but fall outside the Balancing Mechanism's Bid-Offer Acceptances.

NESO publishes Balancing Services Adjustment Data (BSAD) twice daily, covering balancing actions taken outside the formal balancing mechanism. This data feeds into the Balancing & Settlement Code for imbalance settlement processes. The dataset provides transparency on system operator interventions that sit outside standard market mechanisms.

NESO publishes real-time data on upcoming electricity trades used for system balancing, refreshed every ten minutes. The dataset shows trades scheduled for delivery to meet forecast balancing requirements at minimum cost. Trade details are provisional and subject to confirmation with counterparties.

NESO publishes half-hourly forecasts for embedded wind and solar generation from same-day to 14 days ahead, updated hourly. The dataset covers distributed renewables connected to distribution networks rather than transmission-connected generation. NESO acknowledges missing archived records and is working to restore them.

BEIS corrected minor calculation errors in CfD Allocation Round 3 budget impact tables, underestimating negative impacts for 2025/26 and 2026/27. The department also corrected price base years from 2011/12 to 2012 in tables B, C, and D. These revisions do not affect any other published results from the allocation round.

Allocation Round 3 awarded CfDs to 12 renewable projects totalling 5.8GW capacity, 2.4GW more than Round 2 in 2017. Projects include offshore wind, advanced conversion technologies, and remote island wind, delivering by 2025. This represents a substantial expansion of subsidised renewable capacity under long-term price guarantees.

DESNZ announces CfD Allocation Round 3 results will be published on 20 September 2019. National Grid ESO will notify all applicants before 8am, with DESNZ publishing successful applications on GOV.UK. Successful applicants receive notification letters with final strike prices, target commissioning dates, and allocated capacity.

DESNZ extended the sealed bid window for CfD Allocation Round 3 and updated the timeline on the allocation portal. The bulletin provides administrative updates to the CfD AR3 process without changing substantive auction parameters.

DESNZ updated the timeline for Allocation Round 3, with five possible schedules published on 5 July 2019 superseding previous dates from 1 May 2019. The bulletin also contains standard GDPR compliance information for the CfD stakeholder mailing list.

Government launched CfD Allocation Round 3 with £65 million budget for delivery years 2023/2024 and 2024/2025, 6GW capacity cap, and application window from 29 May to 18 June 2019. The round uses unchanged allocation framework rules from the January 2019 draft with minor additions for sealed bids and phased offshore wind. Remote Island Wind projects require new schematic diagrams demonstrating eligibility under Regulation 27A.

CMP315 proposes to review how the transmission network expansion constant is determined, which directly affects locational TNUoS charges paid by generators and large users. The modification has been in development since 2019, with the final decision now expected by February 2025. The Panel recommended the original solution by majority vote in January 2024.

CMP316 establishes charging methodology for co-located generation sites combining multiple technologies at one power station. The modification has been through extensive industry review since 2019, with Panel unanimously recommending WACM1 for implementation in August 2025. The Second Final Modification Report was submitted to Ofgem on 8 August 2025.

The government published final draft CfD contracts for Allocation Round 3, including Brexit-related amendments to remove EU law references and standardised Direct Agreement terms for lender protection. LCCC published Minor and Necessary modification guidance, and National Grid opened AR3 registration. These documents give potential applicants visibility of contract terms before the allocation round commences.

BEIS published exemption procedures for generators at sites excluded from CfD Allocation Round 3 under Non-Delivery Disincentive rules. Excluded sites must apply for exemption certificates by 15 March 2019 to participate in AR3, which will commence by 29 May 2019. Sites that failed to meet Milestone Delivery Dates from previous CfD awards face temporary exclusion unless exempted.

Government published draft Allocation Framework for CfD Allocation Round 3 (AR3), introducing an overall capacity cap applicable to all technologies for the first time. The framework adds Remote Island Wind to Pot 2 (less established technologies) and updates eligibility requirements for fuelled technologies. The round is planned to open by May 2019, with the final framework published no later than 10 working days before.

DESNZ published updated CfD contract terms following August 2018 consultation, implementing changes to advanced conversion technologies definition, lower greenhouse gas thresholds, and new Remote Island Wind category. Supply Chain Plan applications for projects over 300MW open 4-10 February 2019 with decisions by 22 March. Administrative strike price methodology for third allocation round (Pot 2 technologies) also published.

DESNZ published Supply Chain Plan Guidance for CfD Allocation Round 3, requiring projects of 300MW or more to obtain supply chain certificates before bidding. The guidance includes minor changes requiring developers to submit post-build reports and providing more detail on monitoring processes. A new resource portal consolidates information from all CfD delivery partners with query management services.

AR3 will offer £60m for 'less established' renewables (pot 2) delivering in 2023/24 and 2024/25, with auction opening by May 2019. The budget targets around 4GW of capacity, capped at 6GW maximum to increase competitive tension. Administrative Strike Prices for both delivery years have been published in draft.

LCCC announces a training course on CfD processes for potential applicants, lenders, and advisors on 27 November 2018. The course covers bidding strategies and end-to-end CfD procedures. Priority places are free and allocated first-come, first-served.

CMP304 seeks to reform the Enhanced Reactive Power Service but has been repeatedly paused since 2018. The modification was de-prioritised while NESO conducted reactive power market feasibility studies, then moved from low to medium priority in February 2026 following completion of those studies and the raising of related modification CMP457.

NESO proposes removing the Enhanced Reactive Power Service (ERPS) from the CUSC, a tendered commercial service that has attracted no bids in 7.5 years and no contracts in 9 years. Ofgem has delayed decision pending alignment with related proposal CMP304. The removal affects balancing service providers but has low industry impact.

Government announced third CfD auction will open by May 2019, with subsequent auctions every two years using £557 million budget. Published Part B consultation response covering advanced conversion technologies, load factor assumptions, and contract terms. Launched six-week follow-up consultation on implementation details, closing 10 October 2018.

DESNZ published Part A of its response to the December 2017 CfD consultation, implementing three minor changes: defining remote island wind as eligible for Pot 2, updating combined heat and power requirements, and revising the waste fuel definition. A draft Statutory Instrument was laid before Parliament to implement these changes.

GC0117 seeks to harmonise GB power station connection requirements by implementing EU Connection Code obligations within the Grid Code. The modification has been under development since 2018, was sent back by Ofgem in July 2025, and workgroups are now reconsidering DNO feedback on the cost-benefit analysis. The next workgroup meeting is scheduled for March 19, 2026.

BEIS introduces Post Build Reports (PBR) and interim Post Build Reports (iPBR) to monitor whether CfD projects above 300MW deliver on Supply Chain Plan commitments. Projects must submit PBRs within three months of commissioning, with iPBRs required for new applications if previous projects haven't yet submitted final reports. Reports are limited to 10 pages covering competition, innovation, and skills delivery against original commitments.

CMP288 proposes explicit charging arrangements to recover additional transmission costs when users delay grid connection works or require backfeed arrangements. The modification has been low priority since October 2024, with Panel confirming this status in February 2025. The proposal targets cost recovery from developers who cause transmission owners to undertake works early due to user-initiated delays.

National Grid confirmed to BEIS that qualifying CfD applications exceed the available budget, triggering an auction process. Sealed bids will be requested between 14-18 August 2017 following completion of the qualification appeals process on 2 August. An independently audited auction will determine which projects receive contracts at what strike prices.

GC0103 proposes harmonising UK electrical standards with EU Connection Codes within the Grid Code, affecting compliance obligations for generators and network operators. The modification has been in development since 2017 but repeatedly stalled due to low prioritisation, with the Panel requiring further work on Applicable Electrical Standards as of February 2026. It impacts transmission owners, generators, and network operators across medium-scale operations.

The qualification appeal window for CfD Allocation Round 2 closed, with appeals now submitted to Ofgem from currently non-qualifying applicants. Ofgem will assess these appeals and announce decisions on 2 August 2017.

National Grid has concluded the non-qualification review for CfD applicants, with Ofgem opening a qualification appeal window from 7-13 June 2017. Non-qualifying applicants have seven days to appeal their rejection. This is routine procedural administration for the CfD allocation process.

National Grid closed the non-qualification review window for CfD applications and received review requests from applicants. The delivery body will assess these reviews and notify outcomes by 6 June 2017.

DESNZ clarifies that CfD applicants using Advanced Conversion Technologies can choose whether to declare CHP status at application, as they are not required to utilise heat output. Projects converting to CHP mid-contract will not automatically face CHP Quality Mark requirements or other CHP-specific terms for this allocation round.

The second CfD allocation round opens with a £290m budget for delivery years 2021/22 and 2022/23, with applications closing 21 April 2017. This provides 18 days for eligible renewable projects to submit competitive bids through National Grid's allocation process.

DESNZ launches the second CfD allocation round with applications opening 3 April 2017 and closing 21 April 2017. The round sets geothermal's administrative strike price at £140/MWh and introduces new auction rules for interleaving bids to encourage developers to submit larger capacity bids at lower prices. Fuelled technologies face a cumulative 150MW capacity limit.

BEIS published draft CfD contract changes for the second allocation round, preventing payments for projects hampered by foreseeable events and for stored imported electricity. The changes include revised definitions of foreseeable change in law and clarified treatment of storage on CfD sites. The second allocation round opens 3 April 2017 with new auction rules allowing interleaving bids to encourage larger, cheaper capacity submissions.