National Energy System Operator (NESO): annual C9 review

National Energy System Operator (NESO): annual C9 review | 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: National Energy System Operator (NESO): annual C9 review Publication type: Decision Publication date: 13 March 2026 Last updated: 26 March 2026 Topic: National Energy System Operator (NESO), Electricity transmission Subtopic: Balancing supply and demand Show all updates Print this page Share the page Share on Facebook Share on Twitter Share on LinkedIn Our response to NESO's annual submission of revisions to the statements relating to condition C9 of its Electricity System Operator licence. Details As part of licence condition C9, NESO must review all statements under that condition once a year and suggest updates where needed. These condition C9 licence statements are the: procurement guidelines statement (PGS) applicable balancing services volume data methodology statement (ABSVD) balancing principles statement (BPS) system management action flagging methodology statement (SMAF) balancing services adjustment data methodology statement (BSAD) NESO can also propose changes to these statements at other times. This letter explains our response to changes NESO proposed on 13 February 2026. Outcome We have decided not to use our powers of veto in relation to NESO’s submission. In assessing the proposed revisions submitted by NESO, we considered the positions shared by industry respondents during the formal consultation conducted by NESO between 9 January and 6 February 2026, as well as NESO’s replies to this consultation feedback. We expect NESO’s revisions to go live on 1 April 2026. Documents NESO's annual Condition C9 revisions: decision [PDF, 107.84KB] Print this page Share the page Share on Facebook Share on Twitter Share on LinkedIn All updates 26 March 2026 added updated decision document with minor amendment. Close