Concerning issues found at GB power grid after inquiry examines cover-up claims

Inquiry followed blackout allegations

The three-month investigation began after whistleblowers alleged that Neso had concealed a growing risk of blackouts. They said the grid was becoming harder to manage and that the corporate affairs team interfered with control room decisions to protect the operator’s reputation.

Neso dropped plans for an internal review and commissioned an independent investigation by law firm Eversheds Sutherland. Its findings were published on Monday. The allegations followed the June heatwave, when grid frequency repeatedly fell below normal operating limits and emergency support from neighbouring countries was needed to keep electricity flowing.

Concerns about workplace culture

Ofgem chief executive Tim Jarvis said the inquiry did not substantiate the whistleblowers’ specific claims. However, he said it identified important concerns about Neso’s working culture and practices. The report found a view among staff that senior executives did not fully understand the pressures on control room engineers responsible for keeping the lights on.

Neso and government respond

Neso chief executive Fintan Slye called the report constructive, saying it identified ways the company could improve how staff raise concerns and how those concerns are addressed. He said Neso would follow the recommendations, work with trade unions and keep colleagues informed about progress.

Jarvis said Ofgem would establish the facts, identify lessons and ensure action was taken, adding that the regulator would not prejudge its assessment. Energy minister Michael Shanks said the government expected significant action without delay and would monitor progress closely.