Staff at Ofgem have voted to renew their strike mandate as negotiations continue between the PCS union and the energy regulator over job security and pay.
PCS has announced that its members backed strike action by 93% on a turnout of 68%.
Ofgem staff began strike action over the dispute in August 2025 and took further action in September and November.
PCS said significant progress has since been made to resolve some areas of the dispute, but due to "delays and protracted negotiations" in areas such as pay and job security, and the six-month time limit on strike mandates, it had to seek a new mandate from members to support the continuing negotiations.
The union said it has, in light of the ballot results, written to Ofgem with deadlines for progress on the pay negotiations and expects its members' "legitimate demands to be met”.
PCS added that its members have “made it clear that they are prepared to take further strike action if necessary to achieve those demands".
An Ofgem spokesperson said: “We’re disappointed that PCS has progressed with a further ballot on industrial action. More than a third of Ofgem’s workforce are PCS members, and we continue to engage with the union and with staff on these important issues, following constructive conversations that have taken place in recent months.
“As with the rest of the public sector, it’s vital that we’re as efficient and effective as possible for the households and businesses we serve, while also ensuring we attract and retain the people and skills we need.
“We remain hopeful that issues can be resolved without further industrial action, and our priority remains focused on supporting our staff, and serving energy consumers across Great Britain.”
Ofgem is currently being led by acting chief executive Tim Jarvis following Jonathan Brearley's departure to become permanent secretary of the Department for Energy Security and Net Zero, Ofgem's sponsor department.