Modifications to the RIIO-3 licences and associated documents

Modifications to the RIIO-3 licences and associated documents | Ofgem Please enable JavaScript in your web browser to get the best experience. BETA This site is currently in BETA. Help us improve by giving us your feedback . Close alert: Modifications to the RIIO-3 licences and associated documents Publication type: Consultation Publication date: 16 December 2025 Closed date: 17 January 2026 Status: Closed (with decision) Topic: Energy network price controls Subtopic: RIIO-3 Print this page Related links RIIO-3 Final Determinations for the Electricity Transmission, Gas Distribution and Gas Transmission sectors Share the page Share on Facebook Share on Twitter Share on LinkedIn We are seeking views on the proposed modifications to the licences for the RIIO-3 Price Control. Details of outcome We published a statutory consultation on 16 December 2025 on proposed changes to the licence conditions required to implement the RIIO-3 price control settlement for electricity transmission, gas transmission and gas distribution networks. The consultation closed on 16 January 2026. Following careful consideration of responses, we have decided to implement the licence modifications as set out in the notices below. The licence modifications will come into effect on 1 April 2026. In December 2025 we also consulted on a number of associated documents, which set out the detailed methodologies and guidance that support the licence conditions. Our decisions on these will follow in Spring 2026. Read the full outcome Note: some of the files attached below are not fully accessible. If you require an alternative format, please contact RIIO3@ofgem.gov.uk . Decision on the RIIO-3 licence modifications: reasons and effects [PDF, 1.39MB] RIIO-3 notice of modifications: electricity [PDF, 161.53KB] RIIO-3 notice of modifications: gas [PDF, 221.81KB] RIIO-3 PCFM and other models [ZIP, 36.31MB] RIIO-3 PCFH and PCFM guidance chapters [ZIP, 6.66MB] RIIO-3 consolidated licence: clean versions [ZIP, 18.17MB] RIIO-3 consolidated licence: tracked change versions [ZIP, 21.25MB] Licence consultation consolidated response logs [ZIP, 1.15MB] RIIO-3 licence consultation responses [ZIP, 12.76MB] Consultation description This statutory consultation sets out the proposed changes to the licence conditions required to implement the RIIO-3 price control settlement for the transmission companies, gas distribution networks and the electricity system operator. This includes changes to the Special Conditions as well as some of the Standard and Standard Specials. We are also consulting on a number of the associated documents that help support these licence modifications. Who should respond We welcome responses from: transmission network operators gas distribution network operators National Energy System Operator (NESO) anyone with an interest in the RIIO-3 Price Control Consultation documents RIIO3 statutory consultation on the proposed licence modifications [PDF, 1.36MB] Notice of consultation for electricity transmission [PDF, 139.34KB] Notice of consultation for the Gas Special and Standard Licence Conditions [PDF, 129.80KB] RIIO-3 consolidated licences clean versions [ZIP, 17.05MB] RIIO-3 associated documents [ZIP, 26.65MB] RIIO-3 PCFH tracked and clean [ZIP, 7.60MB] RIIO-3 PCFMs and WACC model [ZIP, 11.02MB] RIIO-3 licence consultation response grids [ZIP, 7.69MB] RIIO-3 initial consultations responses collated [XLSX, 570.29KB] RIIO-3 consolidated licences tracked [ZIP, 25.02MB] SpC 9.24 CSNP Coordination (SPTL) [PDF, 188.35KB] Print this page Related links RIIO-3 Final Determinations for the Electricity Transmission, Gas Distribution and Gas Transmission sectors Share the page Share on Facebook Share on Twitter Share on LinkedIn Close