Hunterston B Becomes First AGR Station Transferred to UK Government Ownership

A £20.7 billion ring-fenced decommissioning fund and a decade-long queue of institutional decisions now sit behind one clean milestone: the Hunterston B nuclear power station in North Ayrshire, Scotland transferred from EDF Energy to the UK's Nuclear Decommissioning Authority just after midnight on 1 April 2026, becoming the first of seven Advanced Gas-cooled Reactor stations to formally enter government ownership.

The handover activates a sequenced playbook the NDA and its subsidiary Nuclear Restoration Services intend to replicate across the entire AGR fleet. Hinkley Point B in Somerset is next, expected in autumn 2026. The remaining five stations — Dungeness B, Hartlepool, Heysham 1, Heysham 2 and Torness — roll in on a rolling basis as each completes generation and defueling, with Hartlepool and Heysham 1 currently scheduled to stop operating in March 2028 and Heysham 2 and Torness in March 2030.

Hunterston B's own defueling set the template. The station stopped generating in January 2022 after 46 years of operation and produced enough low-carbon electricity to power every home in Scotland for over 30 years. In less than three years, the site team removed more than 4,800 spent fuel elements, completing the work on time and on budget before the ONR declared the site fuel-free in April 2025. That fuel now routes to Sellafield for interim storage, a path every other AGR will follow.

With defueling complete, the ONR formally relicensed Hunterston B to NRS on 18 March 2026. The licence transfer triggered the shift in financial and legal accountability: decommissioning costs now draw from the Nuclear Liabilities Fund, a ring-fenced pool established in 1996 and built from EDF operational contributions, proceeds from the sale of British Energy to EDF, investment returns and government top-ups totaling £20.7 billion across the fleet. NRS will manage Hunterston B alongside the neighbouring Hunterston A site, which it has already been decommissioning for years, and holds licences across 13 former reactor and research sites in Great Britain.

The workforce transition is just as concrete as the financial one. On transfer day, 246 EDF employees moved to NRS payroll, bringing site knowledge that no contract clause can fully replicate. David Peattie, NDA Group CEO, described the outcome as "a strong blueprint for the remaining AGR stations," citing collaboration between the NDA group, EDF, government, the Nuclear Liabilities Fund and regulators. EDF's Decommissioning Director Paul Morton said the team delivered the transfer "on schedule" and acknowledged the weight of the handover: "Hunterston B has been an integral part of the EDF family."

The immediate decommissioning agenda focuses on removing plant, equipment and services outside the reactor buildings, managing associated radioactive waste, and entering the care-and-maintenance phase before active dismantlement of the reactor structures begins. That staged approach is deliberate: it allows radioactivity to decay and gives the specialist contracting supply chain time to develop the tooling and processes that six more stations will eventually need.

Whether Hinkley Point B transfers on the same tidy timetable this autumn will answer the real question Hunterston B leaves open: is this a replicable template, or a first-mover result built on years of accumulated preparation that the rest of the fleet will struggle to match?