Statistics

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.

HM Treasury's monthly statistical release on UK official holdings of international reserves for March 2026. UK government gross reserves fell $6.4bn to $230.3bn; net reserves fell $7.9bn to $116.9bn, driven by valuation effects. No foreign exchange intervention was undertaken.

NESO's March 2026 monthly energy statistics report GB's generation mix and demand. Wind set a new maximum generation record of 23,880 MW on 25 March, providing 60% of electricity at peak. Wind led the month at 34.8% of generation, gas second at 22.2%, with peak demand of 38,160 MW on 3 March.

Ofgem publishes ECO4 progress data as of March 2026, showing 97.83% of the £224.3m Home Heating Cost Reduction Obligation delivered with nine months remaining. Over 1.03 million measures have been notified across the scheme, with heating controls (504,480), loft insulation (123,178), and solid wall insulation (88,278) the largest categories.

Ofgem's ECO4 progress report shows 1,032,211 measures notified as of March 2026, with suppliers at 97.83% of their £224.3m Home Heating Cost Reduction Obligation target. Heating controls dominate delivery at 504,480 measures (49% of total), followed by loft insulation (123,178) and solid wall insulation (88,278). The scheme runs to 31 December 2026.

Warm Homes: Social Housing Fund statistics pre-announcement.

Warm Homes: Local Grant statistics pre-announcement.

Ofgem's FIT data portal page lists the standard suite of Feed-in Tariff reports: annual, quarterly, deployment caps, installation, and levelisation. This is an index page linking to existing datasets, not a new release. The FIT scheme closed to new applicants in March 2019; these reports track the legacy tail.

Ofgem publishes the quarterly FIT levelisation report detailing total payments made by FIT licensees to accredited generators. This is a routine administrative publication — a landing page for downloading historical levelisation data. No new policy, no rule change.

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.

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 and Prices statistical release for 2 April 2026. Summary statistics on energy production, trade, generation, consumption, and domestic price indices.

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 total energy chapter. Component of March 2026 release.

Energy Trends UK solid fuels chapter. Coal consumption -56%, zero generation in 2025.

Energy Trends UK oil chapter. Primary oil production +2.6%, product demand +0.2%.

Energy Trends UK gas chapter. Production -3.3%, imports +2.3%, demand -0.9%.

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

Energy Trends UK weather chapter. Temperature, wind speed, sun hours context for consumption.

NESO publishes the draft 2026/27 AAHEDC tariff at 0.044201p/kWh, a 7.8% increase on the prior year. The £121m total scheme amount subsidises distribution costs in Northern Scotland and Shetland, recovered from all licensed suppliers pro rata to demand. Final tariff due mid-July 2026, effective retrospectively from 1 April 2026.

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

Weekly road fuel price statistics from DESNZ. Tracks petrol and diesel pump prices. Not electricity-relevant.

Weekly road fuel price statistics from DESNZ. Tracks petrol and diesel pump prices. Not electricity-relevant.

Weekly road fuel price statistics from DESNZ. Tracks petrol and diesel pump prices. Not electricity-relevant.

Weekly road fuel price statistics from DESNZ. Tracks petrol and diesel pump prices. Not electricity-relevant.

Weekly road fuel price statistics from DESNZ. Tracks petrol and diesel pump prices. Not electricity-relevant.

Ofgem sets the RO buy-out price at £69.34/ROC for 2026-27, up 3.4% from £67.06, with the indexation basis switching from RPI to CPI following DESNZ's January 2026 decision. The obligation level drops slightly to 0.472 ROCs/MWh from 0.493. Mutualisation ceilings are £417.7m for England & Wales and £41.8m for Scotland.

HM Treasury published updated GDP deflators based on ONS Quarterly National Accounts to Q4 2024-25, with OBR forecasts to 2030-31. This is a general macroeconomic statistical release used across government for converting nominal to real prices. It contains no energy-specific content.

Weekly road fuel price statistics from DESNZ. Tracks petrol and diesel pump prices. Not electricity-relevant.

Final UK greenhouse gas emissions statistics 1990-2024. Covers all sectors including electricity generation, transport, heating, industry, and agriculture.

Monthly and annual road fuel and petroleum product price statistics. Covers petrol, diesel, and heating oil prices.

Prices of fuels purchased by manufacturing industry, including electricity, gas, and oil products. Shows input energy costs for industrial consumers.

Fuel input prices paid by major power producers for coal, gas, and oil. Tracks the cost of thermal generation inputs over time.

Industrial energy price index series tracking electricity and gas costs for industrial users over time.

Non-domestic gas and electricity price statistics covering SME and large business tariffs. Tracks unit rates and total costs outside the price cap.

International road fuel price comparison data. Benchmarks UK petrol and diesel prices against other countries.

Domestic energy price index series for electricity and gas. Tracks household energy cost trends over time as index numbers.

Annual domestic energy bill statistics showing typical household electricity and gas costs by payment method and consumption level.

Quarterly statistics on domestic energy supplier switching rates. Tracks the number of electricity and gas customers changing supplier.

Quarterly statistics on domestic energy customer numbers by supplier and payment method. Tracks market share distribution.

Index page for the Quarterly Energy Prices statistical release. Links to component datasets covering domestic and non-domestic electricity and gas prices.

Quarterly Energy Prices statistical release covering domestic and non-domestic electricity and gas prices across GB. Includes unit rates, standing charges, and price index trends.

Ofgem's RO annual report for Scheme Year 23 (April 2024–March 2025) shows 101.4 million ROCs issued against a supplier obligation of 119.5 million ROCs, with suppliers presenting 105.9 million ROCs and paying £613.7 million into buy-out and late payment funds. RO-accredited generation from 35.0 GW of capacity produced electricity equivalent to 30.2% of UK supply, rising to 46.6% when combined with FiT and CfD. Two supplier failures (Tomato Energy and Rebel Energy) created a £23.6 million shortfall, though this remained below the mutualisation threshold for the third consecutive year.

Ofgem publishes the 16th annual biomass sustainability dataset under the Renewables Obligation, covering Scheme Year 23 (2024-2025). The dataset reports against sustainability criteria introduced in 2009 for biomass-fuelled generating stations. It accompanies the RO Annual Report's biomass sustainability chapter.

Ofgem published its 63rd quarterly FIT report covering Q4 2025 (October-December), summarising installations, installed capacity, and levelisation for the scheme now in its 16th year. The scheme has been closed to new applicants since April 2019; this is routine monitoring of legacy obligations.

Ofgem reports that 17 million fixed Direct Debit households held an average total credit balance of £3.17 billion across the year ending December 2025, down £113 million year-on-year from £3.28 billion. The average household credit balance fell from £215 to £199 over the same period, though the point-in-time balance at end-December 2025 rose to £212 from £206.

DESNZ quarterly energy price statistics covering domestic and industrial consumers across all major fuels for Q4 2025, with international comparisons. No extracted text available from the announcement page.

DESNZ published a list of oil and gas Environmental Impact Assessment submissions from 2021, showing project statuses including determinations and withdrawals. The data covers offshore developments under the 2020 EIA Regulations with projects from companies including IOG UK, Premier Oil, and TotalEnergies. This is routine administrative reporting of fossil fuel project assessments.

DESNZ announces routine statistics on road fuel sales, deliveries and stock levels at UK filling stations covering January 2020 to March 2026. This is administrative reporting of transport fuel data with no connection to electricity markets or grid infrastructure.

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.

DESNZ publishes annual statistics on fuel poverty in England for 2025, including household composition analysis and 2026 projections. This is routine monitoring data tracking the distributional impact of energy costs. The report follows the established Low Income High Costs indicator methodology.

Feed-in Tariff rates increase by 3.4% from 1 April 2026, following the Consumer Price Index adjustment. The FIT scheme closed to new entrants in 2019, so this affects only existing installations receiving generation and export tariff payments. This is an automatic annual adjustment under existing regulations.

DESNZ publishes sub-regional fuel poverty estimates for England in 2024, providing geographical breakdown of households unable to afford adequate energy services. This is routine statistical reporting on the distributional impact of high energy costs across local areas.

Ofgem's January 2026 consumer satisfaction survey shows 81% satisfaction with energy suppliers, unchanged from July-August 2025. Customer service satisfaction remains at an all-time high of 77%. Among customers who fell behind on payments, 28% were not contacted by suppliers, up from 20% in the previous survey.

Monthly statistics released covering household energy efficiency measures delivered under the Energy Company Obligation (ECO) and Green Deal Framework. The data tracks government-mandated insulation and efficiency programmes. No indication of specific metrics or trends in this announcement.

DESNZ published quarterly statistics on smart meter installations by large suppliers for Q1 2026. The release covers installation numbers and total smart/non-smart meter counts at end-March 2026.

DESNZ publishes statistical collection on household energy efficiency programmes including Energy Company Obligation (ECO) and Green Deal measures. The release provides quarterly ECO cost data and annual insulation statistics. Q4 2025 ECO costs will appear in both the detailed annual report on 19 March and regular quarterly statistics on 26 March.

DESNZ published annual statistics on government-funded household energy efficiency schemes through December 2025, covering 4.9 million measures installed in 2.9 million homes since 2013. ECO accounted for 71% of 2025 installations (271,700 measures), while total scheme delivery fell 14% year-on-year to 385,000 measures. ECO costs reached £11.32 billion cumulative, with 2025 delivery costs falling 24% to £1.43 billion.

Smart meter rollout statistics show 41 million smart and advanced meters operating at end-2025, covering 71% of all meters in Great Britain. Installation pace slowed by 5.8% to 2.8 million meters in 2025, with quarterly volumes declining in the second half after increases in Q1-Q2. The programme continues transferring SMETS1 meters to the national communications network to maintain interoperability between suppliers.

DESNZ publishes quarterly statistics on smart meter roll-out, covering domestic and smaller non-domestic installations and operations. Data includes meters installed and operating across Great Britain, with quarterly updates for large suppliers and annual whole-market data. Historical data prior to 2017 available on request.

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.

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 published quarterly energy statistics for Q4 2025, covering production, consumption and trade across coal, oil, gas, electricity and renewables. The release provides standard statistical data on energy flows during the final quarter of 2025. This is routine statistical reporting with no policy content.

DESNZ releases statistics tracking energy efficiency installations under the Warm Homes: Social Housing Fund in England through February 2026. The data monitors retrofit measures in social housing properties. This is routine statistical reporting on a fuel poverty programme.

DESNZ publishes February 2026 statistics for the Warm Homes: Local Grant scheme, tracking energy efficiency measure installations in English domestic properties. The release provides monitoring data on household insulation and efficiency upgrades delivered through local authority administration.

DESNZ will release data monitoring energy efficiency measure installations in English social housing under the Social Housing Decarbonisation Fund for January 2026. The release tracks progress of the SHDF scheme which provides grants to housing associations and councils for retrofitting social homes. This forms part of routine monitoring of government-funded decarbonisation programmes.

DESNZ announces March 2026 release date for GBIS installation statistics. The Great British Insulation Scheme monitors energy efficiency measures in domestic properties through obligated energy suppliers. This tracks implementation of an existing consumer support programme.

DESNZ publishes quarterly statistics on UK heat pump installations through March 2026. The release tracks deployment numbers against government targets of 600,000 annual installations by 2028. Heat pump adoption affects electricity demand patterns and peak loads but remains primarily a heating sector metric.

DESNZ expands heat pump deployment statistics to capture all retrofits in the UK, not just those supported by government schemes. The change aims to track total market deployment rather than only policy-supported installations. Data tables provide quarterly counts of hydronic heat pumps up to 45kW capacity.

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 publishes a triannual Public Attitudes Tracker surveying public awareness and behaviours on energy topics. The survey frequency was reduced from quarterly to triannual from Summer 2023. Data collection methodology changed to address-based online surveying from Autumn 2021.

DESNZ expands its heat pump statistics to include all UK heat pump installations, not just those supported by government schemes. The department shifts from policy-specific deployment tracking to total market coverage for hydronic heat pumps up to 45kW. Statistics remain 'in development' status with methodology still being refined.

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 publishes weekly road fuel prices for unleaded petrol and diesel as routine statistics. This covers transport fuel pricing with no connection to electricity markets.

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.

DESNZ publishes weekly retail prices for unleaded petrol and diesel at UK forecourts. This is routine statistical reporting on road fuel costs with no connection to electricity markets or grid infrastructure.

DESNZ published February 2026 statistics on Boiler Upgrade Scheme installations, monitoring uptake of air source heat pumps, ground source heat pumps and biomass boilers. The scheme provides grants for low carbon heating technologies to replace gas boilers in domestic properties.

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.

DESNZ published routine ambient gamma radiation monitoring data from fixed and mobile monitors across the UK, with updated location coordinates following network upgrades in August 2025. The report covers background radiation measurements taken hourly through the Radiological Response and Emergency Management System.

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.

NESO publishes a list of 35 organisations registered to provide demand flexibility services, split between domestic/micro-business (18 providers) and industrial/commercial (17 providers). The list includes contact details and notes which providers are members of the Flex Assure compliance scheme. Updated February 24, 2025.

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 real-time physical notifications data from non-Balancing Mechanism service providers through its Open Balancing Platform system. The platform currently hosts Quick Reserve Service data, with Slow Reserve and Dynamic Response data to be added as those services launch. This provides transparency into how flexibility providers declare their availability to the system operator.

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.

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.

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.

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.

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.

DESNZ publishes routine workforce management data covering payroll staff by grade, headcount numbers, and staff costs. This is administrative reporting with no bearing on energy markets or infrastructure deployment.

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.

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.

NESO publishes the Net Transfer Capacity values it submits for NemoLink interconnector capacity calculations, showing GB import and export limits in MW per hour. These values restrict maximum flows but final capacity may be lower after combining with French TSO values and physical interconnector capability. Values are only published when NESO applies restrictions.

NESO publishes its intraday transfer limits for the IFA interconnector, showing the MW capacity restrictions it submits to interconnector capacity calculation processes per hourly period. These NESO values combine with connected system operator values and physical capability to determine final interconnector capacity. Values are only published when NESO applies restrictions.

NESO publishes hourly Net Transfer Capacity values for North Sea Link interconnector that restrict maximum GB import and export flows. These values feed into interconnector capacity calculations alongside connected system operator inputs and physical capability constraints. Final capacity may be lower than NESO's submitted values.

NESO publishes its Net Transfer Capacity values for ElecLink interconnector, showing the maximum import and export flows NESO allows in MW per hour. These values feed into capacity calculation processes alongside connected system operator values and interconnector capability to determine final available capacity. Values are only published when NESO applies restrictions.

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 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.

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.

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.

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 interconnector projects holding connection contracts, listing active and future projects with their firm Transmission Entry Capacity (TEC). The register includes import/export capacity figures and contractual definitions under CUSC. From November 2025, the register will add a 'Gate' column distinguishing Gate 1 and Gate 2 agreements under Connections Reform.

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.

NESO publishes data on interconnector trading auctions used to manage grid constraints and energy balancing across six links (IFA1, BritNed, NEMO, IFA2, ElecLink, Viking Link). Trading occurs ad hoc throughout the day with qualified counterparties who hold interconnector capacity and BSC registration. Data includes volumes secured, best price, volume-weighted average price, and clearing price for each requirement.

NESO publishes historic Grid Trade Master Agreement (GTMA) trading data from April 2015, covering trade volumes, prices, and costs. The dataset updates monthly with previous month's data and refreshes daily to capture trades between D-1 06:00 and D 06:00. Post-delivery changes like counterparty defaults may not be retrospectively updated.

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.

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.

NESO publishes methodology for its Carbon Intensity API, which forecasts CO2 emissions per kWh up to 48 hours ahead. The forecast uses generation mix data, demand forecasts, and weather inputs to calculate national carbon intensity in gCO2/kWh. This is a methodological document explaining an existing data product, not announcing new market rules or charges.

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.

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.

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.

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 aggregated data on balancing actions taken outside the standard balancing mechanism, updated twice daily. The Balancing Services Adjustment Data covers actions submitted to the BSC for settlement purposes. This is routine operational data publication from 2019.

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.

NESO releases day-ahead constraint flow data showing actual power flows and thermal limits across transmission boundaries. The data captures network conditions at the time of measurement and includes visual network diagrams showing constraint boundaries and flow directions. Published 5 November 2019, this represents operational transparency rather than market mechanism change.

DESNZ publishes annual statements calculating the UK's net carbon account under the Climate Change Act 2008. These statements track emissions against statutory carbon budgets to determine compliance. This is routine administrative reporting of historical emissions data.

HM Treasury GDP deflators used to convert nominal prices to real terms across government. This is a general macroeconomic reference dataset, not an energy-specific publication.

HM Treasury statistical release on UK official holdings of international reserves. This is a monetary/fiscal data series with no connection to energy markets, grid infrastructure, or electricity policy.