Estimated Value
£595,000,000 – £1,290,000,000
Deadline
Not specified
Published
17 October 2025
Type
works
Overview
IDP will deliver conventional infrastructure projects and tasks. There are 3 Lots:
Electrical Distribution Delivery Partner, Utilities Delivery Partner and Civils Delivery Partner. Delivery Partners will take the single viable option and complete detailed design and all procurement, installation, construction, commissioning and handover activities that form part of delivery.
The value stated at II.1.7.1 is the upper value range. The value is for the maximum contract term of 180 months, this term consists of an initial term of 108 months.
The scope of the Strategic Partner was
- Provision of strategic front-end definition
- Portfolio management of programmes, projects and tasks to maximise benefit
- Infrastructure planning (land, utilities, transport, accommodation) to inform and support the Sellafield Ltd Masterplan
- To undertake feasibility studies and initial engineering design, this will require Delivery Partner and Sellafield Ltd subject matter expert input
- To undertake benchmarking and should-cost modelling on costs and schedules
- Production of business cases.
- Provision of input into commissioning strategies and embedding capabilities into business as usual
- To support portfolio planning and optimisation
- To undertake stakeholder engagement
- Sustainability - energy modelling, carbon analysis
- Data management controls, security, governance, retrievals and business continuity
- Drive innovation through the Portfolio
- Knowledge transfer – facilitation, LFE capture, dissemination, obtaining and complying with ISO44001 in the IDP environment
- Gathering, documenting and sharing pre-construction information
Key points
- Refurbishment or replacement of Distribution System Transformers
- Refurbishment or replacement of Electrical substations
- Refurbishment or replacement of Electrical Switchgear
- Replacement of distribution cabling and cable support structures
- Upgrade of site distribution Tele-control system
- Installation of additional standby generation capacity
- Upgrade or refurbishment of existing standby generating capacity
- Upgrade or refurbishment of existing generating capacity
- Installation of additional connection points to the National Grid
- Refurbishment of existing grid connections
- Major repair work to any of the above
- A programme of planned job and tasks
Key points
- Refurbishment or replacement of the on-site steam distribution system and support structures
- Refurbishment or replacement of the on-site water distribution system and support structures.
- Refurbishment or replacement of the off-site water supply and distribution system including the domestic water treatment plant and storage reservoirs
- Refurbishment of the demineralised water treatment and conditioning plant
- Refurbishment or replacement of the on-site compressed air generation and distribution system including support structures
- Refurbishment or replacement of the on-site bulk chemical storage tanks and associated equipment
- Refurbishment or replacement of the on-site chemical distribution system and support structures
- Improvements to rail and road tanker off-load facility
- Refurbishment or replacement of the sewage treatment plant
- A programme of planned job and tasks
Key points
- General civils design and engineering
- Road Network including all earthworks slopes and retaining structures
- Rail Network including all earthworks slopes and retaining structures
- Highway, Rail and Pedestrian Bridges
- Service Bridges (pipes, cables and the like)
- Service Trenches
- Service Supports
- Below ground ducts including street works
- Foundations to equipment (electrical equipment, lighting and the like)
- Above ground service supports
- Hard standings for vehicles and mobile plant including car parks
- Hard and soft landscaping
- Retaining walls
- Security Fences, Turnstiles and Gates
- Other minor civils/structural work including utility supports
Key dates
- Duration
- 180 months
Additional details
Sellafield Ltd made the decision to cancel the Lot 1 procurement in accordance with Sellafield Ltd.'s right to cancel a lot and not to award a contract as provided for at Section 11.9 of the Selection Questionnaire Instructions and also Section 6.6 of the Invitation to Submit Final Tender Instructions. The value stated at V.2.4.2 is the upper value range of the Lot.
The value is for the maximum contract term of 180 months, this term consists of an initial term of 108 months. The value stated at V.2.4.2 is the upper value range of the Lot.
The value is for the maximum contract term of 180 months, this term consists of an initial term of 108 months. The value stated at V.2.4.2 is the upper value range of the Lot. The value is for the maximum contract term of 180 months, this term consists of an initial term of 108 months.
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Award Details
Morgan Sindall Construction and Infrastructure Ltd
£1,290,000,000
Costain Limited
£1,290,000,000
HOCHTIEF UK
£1,290,000,000
Likely incumbents
Suppliers who won similar work from this buyer in the last 5 years.
- 1
Morgan Sindall Construction and Infrastructure Ltd
1 contract wonlatest 2 Oct 2026 - 2
Wates Construction Limited (1)
1 contract wonlatest 2 Oct 2026ends 19 Oct 2030 - 3
BAM Construction Ltd (1)
1 contract wonlatest 2 Oct 2026ends 19 Oct 2030 - 4
Morgan Sindall Construction & Infrastructure Ltd (1)
1 contract wonlatest 2 Oct 2026ends 19 Oct 2030 - 5
Robertson Construction Group Limited (2)
1 contract wonlatest 2 Oct 2026ends 19 Oct 2030
Morgan Sindall Construction and Infrastructure Ltd is the most likely incumbent based on recency and category match. To win, bidders typically need a clearly differentiated proposition or a price advantage.
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two years of filed accountsyour financial standingturnover vs contract valueyour Companies House recordcash flow for 30-day termscredit scores and ratios
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Buyer Profile
Sellafield LimitedKey Dates
Published
17 October 2025
Submission deadline
Not specified
Notice type
award
Source
find a tender
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