Select Committee · Public Accounts Committee

Decommissioning Sellafield

Status: Closed Opened: 31 Oct 2024 Closed: 21 Aug 2025 9 recommendations 23 conclusions 1 report

The Sellafield nuclear site closed in 2003, having operated since 1950. Work began to decommission the site in 2005. Highly hazardous materials are stored there from across the UK’s nuclear industry, and it holds a legacy of contaminated buildings, untreated waste and ageing facilities. The Nuclear Decommissioning Authority (NDA), the public body in charge of …

Reports

1 report

Title	HC No.	Published	Items	Response
28th Report - Decommissioning Sellafield	HC 363	4 Jun 2025	32	Responded

Recommendations & Conclusions

2 items

14 Conclusion 28th Report - Decommissioning Sellafield Acknowledged

Recent major project delivery at Sellafield shows tangible signs of improvement, with several projects on track.

DESNZ told us that it nevertheless believes that “there is some tangible evidence on improvement” and that “the overall direction of travel on project delivery is improving at the site”.36 Four of the five major projects which have been approved since 2018 are on track to be completed in line …

Government response. The government acknowledges the positive progress in major project delivery at Sellafield, referencing the NAO report and the positive contributions of the Programme and Project Partners (PPP) model.

HM Treasury

15 Conclusion 28th Report - Decommissioning Sellafield Acknowledged

New Programme and Project Partners (PPP) model improves major project delivery at Sellafield.

We asked the witnesses to explain what has led to the apparent improvement in how projects are now being delivered. Sellafield Ltd told us that it was now delivering its largest projects in a new way, which it calls ‘Programme and Project Partners’ (PPP). Under this model, it works closely …

HM Treasury

Oral evidence sessions

1 session

Date	Witnesses
20 Mar 2025	Clive Maxwell · Department for Energy Security and Net Zero, David Peattie · Nuclear Decommissioning Authority, Euan Hutton · Sellafield Ltd, Kate Bowyer · Nuclear Decommissioning Authority, Lee McDonough · Department for Energy Security and Net Zero	View ↗

Correspondence

7 letters

Date	Direction	Title
8 Jan 2026	To cttee	Letter from the Group Chief Executive of the Nuclear Decommissioning Authority …
8 Jan 2026	To cttee	Letter from the Interim Permanent Secretary at the Department for Energy Securi…
15 Dec 2025	To cttee	Letter from the Chief Executive Officer of Sellafield Ltd relating to recommend…
24 Nov 2025	To cttee	Letter from the Chair to the Permanent Secretary at the Department for Energy S…
4 Sep 2025	To cttee	Letter from the Chief Executive Officer at Sellafield Limited relating to the 2…
24 Apr 2025	To cttee	Letter from the Group Chief Executive Officer at the Nuclear Decommissioning Au…
7 Apr 2025	To cttee	Letter from the Group Chief Executive Officer of the Nuclear Decommissioning Au…