Lot 1B / WAGR B55 Demolition - Sellafield - A2R JV

The B55 and B55.2 demolition project at Sellafield involves the controlled demolition and dismantling of the B55 Office Complex and B55.2 Turbine Hall, located within the WAGR complex, down to existing ground-floor slab level. The scope includes soft stripping, asbestos remediation, high-reach mechanical demolition of the structural frame, cladding and reinforced-concrete floors, together with segregation and processing of demolition arisings, backfilling of voids and final site clearance.

A key constraint is Substation 65, which is located within the B55/B55.2 structure and must remain operational and be protected from demolition impacts, dust and water ingress throughout the works. Retained basements and associated structures also require protection, while uncertainties associated with ageing structures, buried services, below-ground voids and incomplete historical information must be managed through robust surveys, demolition engineering and risk-informed planning.

Overall, the project is intended to provide a safe, demolition-led solution that reduces workforce exposure, removes redundant infrastructure and supports accelerated hazard reduction across the wider WAGR decommissioning programme.

Additional information: https://www.linkedin.com/company/a2r-altrad-atkinsrealis-remediation

https: //www.gov.uk/government/news/sellafield-ltd-awards-high-hazard-risk-reduction-framework-contract

Open opportunity - This means that the contract is currently active, and the buying department is looking for potential suppliers to fulfil the contract. Contract summary Industry - Nuclear reactors - 42151000 - Construction work for nuclear reactors - 45251111 - Nuclear safety services - 98113100 Location of contract Any region Value of contract £2,500,000 to £5,000,000 Procurement reference C4N121802017 Published date 26 October 2026 Closing date 10 November 2026 Closing time 5pm Contract start date 1 April 2027 Contract end date 31 December 2027 Contract type Works Contract is suitable for SMEs? Yes Contract is suitable for VCSEs? No Description The B55 and B55.2 demolition project at Sellafield involves the controlled demolition and dismantling of the B55 Office Complex and B55.2 Turbine Hall, located within the WAGR complex, down to existing ground-floor slab level. The scope includes soft stripping, asbestos remediation, high-reach mechanical demolition of the structural frame, cladding and reinforced-concrete floors, together with segregation and processing of demolition arisings, backfilling of voids and final site clearance.

A key constraint is Substation 65, which is located within the B55/B55.2 structure and must remain operational and be protected from demolition impacts, dust and water ingress throughout the works. Retained basements and associated structures also require protection, while uncertainties associated with ageing structures, buried services, below-ground voids and incomplete historical information must be managed through robust surveys, demolition engineering and risk-informed planning.

Overall, the project is intended to provide a safe, demolition-led solution that reduces workforce exposure, removes redundant infrastructure and supports accelerated hazard reduction across the wider WAGR decommissioning programme. More information - Links -

- https: //www.competefor.co.uk/business/viewOpportunityDetailsSupplier.html?id=121802067

- Tender notice - Please follow this link to view the notice. - Additional text -

https: //www.linkedin.com/company/a2r-altrad-atkinsrealis-remediation

https: //www.gov.uk/government/news/sellafield-ltd-awards-high-hazard-risk-reduction-framework-contract

How to apply Follow the instructions given in the description or the more information section.

About the buyer

Contact name Laura Walsh Address 1st Floor, Galemire Court, Crow Park Way, Westlakes Science & Technology Park Moor Row CA24 3HY UK

Telephone: [contact details removed]

Closing: 10 November 2026, 5pm