Source · Select Committees · Public Accounts Committee
28th Report - Decommissioning Sellafield
Public Accounts Committee
HC 363
Published 4 June 2025
Government response
Treasury minutes: Government response to the Committee of Public Accounts on the Twenty-eighth report from Session 2024-26 · published 18 Sep 2025
Recommendations & Conclusions
13
Conclusion
Not Addressed
Major project delays and costs at Sellafield significantly escalated since 2018 due to poor planning.
Conclusion
When it last took evidence on Sellafield, the previous Committee was told that major project delivery was improving.32 The NDA told it that “cost forecasting is improving” while the Department said that “for the first time now, the estimates of …
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Government Response Summary
The government response does not directly address the committee's finding of increased costs and delays for major projects, instead citing a 2024 NAO report that noted positive progress in more recent projects and praised the Programme and Project Partners model.
HM Treasury
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28
Conclusion
Geological Disposal Facility project experiences significant delays and slow progress.
Conclusion
The NDA also needs to construct a ‘Geological Disposal Facility’ (‘GDF’) to store waste permanently – including that currently at Sellafield. This project is still at a very early stage: it needs to drill boreholes before it can even start …
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HM Treasury
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