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AwardedUnited KingdomWorks£2,945,000,000

Infrastructure Delivery Partnership (IDP)

Published
Published 20 October 2025
Deadline
Closed 5 February 2024

Overview

The Infrastructure Delivery Partnership 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. Note: When the procurement commenced there were originally 4 Lots, however, during the course of the procurement Lot 1 Strategic Partner was cancelled. This was 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.

Key details

Country
United Kingdom
Status
Awarded
Category
Works
Estimated value
£2,945,000,000
Procedure
Selective
SME suitable
No
Published
20 October 2025
Deadline
Closed
Classification (CPV)
Construction work

Award outcome

Awarded value
£2,945,000,000
Award date
9 October 2025
Contract period
9 October 2025 → 10 October 2040
Winners
  • Costain Limited
  • HOCHTIEF UK
  • Morgan Sindall Construction & Infrastructure Ltd

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Notice history

Every published notice in this contracting process, newest first.

  1. Contract Award Notice

    20 October 2025

Contracting authority

  • Sellafield Ltd

    Buyer

    Whitehaven, United Kingdom

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Awarded: Infrastructure Delivery Partnership (IDP) — won by Costain Limited +2 — Skim