The statement made by Michael Shanks, the Minister for Energy, in the House of Commons on 15 July 2026.
On 7 July, the shadow Secretary of State, the right hon. Member for East Surrey (Claire Coutinho), wrote to the Government alleging practices of poor information handling in NESO and interference in operational decision-making in the control room. The Government take this issue incredibly seriously. Since the allegations came to light, we have been engaging with NESO and Ofgem to establish the facts. Both my right hon. Friend the Secretary of State and I have spoken to the chief executive of NESO.
NESO has now appointed an external legal firm to conduct a full investigation into the claims, and a report is to be delivered to the board’s head of risk and controls and to Ofgem in the coming weeks. The legal firm will interview members of the control room, without any other NESO employees present. NESO has already responded publicly that all operational decisions are taken solely by authorised operational control room personnel, and that NESO does not instruct employees to avoid retaining records. We will work closely with Ofgem to monitor both the progress and the outcome of the investigation. However, it would be wrong to pre-empt that outcome, and the investigation must be allowed to run its course.
I want to make it clear that during this period of unprecedented extreme heat, the Great British grid remains stable. No customers were impacted by tight electricity margins, and NESO had a number of tools available to ensure our energy security. Great Britain has one of the most resilient energy systems in the world, and the Government work closely with NESO and the wider sector to ensure that this resilience is constantly maintained. Market notices, such as those issued by NESO during the heatwaves, are standard operational tools that can be used to support energy security, and these were used successfully to maintain grid stability. However, it is important to acknowledge that extreme heat events, such as those experienced this summer, are likely to occur more frequently as our climate continues to change.
My Department will continue to work with NESO and Ofgem to identify any lessons from these events, and to work to ensure that our electricity system remains resilient. Ofgem, as the independent regulator, is also working with NESO to initiate a formal review of events during the June heatwave. I welcome this important transparency, and look forward to working with NESO and Ofgem on taking forward the lessons learned.