Question to the Department for Energy Security & Net Zero:

To ask His Majesty's Government whether any assessment has been made of the impact of the plutonium stockpile at Sellafield on the long-term national interest by anyone other than the Nuclear Decommissioning Authority; and if so, who.

The decision to immobilise the UK’s civil separated plutonium inventory was taken by the Government, based on consideration of strategic, technical, economic and safety and security factors. A substantial component of this analysis was delivered by NDA, and the Government also engaged with international partners and relevant experts in a range of organisations.