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DNWP009.161/LOT 2/Commissioning Support

Sellafield Ltd

Awarded
services

This tender has closed

The submission deadline for this contract has passed. There may be more active services tenders from Sellafield Ltd, and hundreds more across the UK public sector.

Key details

Contracting authority
Region
Warrington
Contract value
£10,000,000ex VAT
Submissions closed
15 December 2025
Published
3 February 2026

Procurement

Contract period
19 December 2025 - 26 September 2026
9 months
Procedure type
Call-off from a framework agreement
CPV classifications
  • 79411000 General management consultancy services
  • 98391000 Decommissioning services

What happened

Sellafield Ltd awarded this contract to The Decommissioning Alliance II worth £4,509,717 on 19 Dec 2025. The contract runs until 26 Sept 2026.

Description

The Client will act as the Intelligent Client for DNWP. "Intelligent Client" is defined as the in-house capability which has the responsibility for the ownership, management and delivery of a defined service or range of services. The Intelligent Client is capable of specifying requirements to external participants and managing the delivery outcomes, which requires the selection of appropriate participants and the management of relationships to maximise value.

There are two separate delivery models that may be applied to each project / task, depending on the nature and scoping of the work. The role of the Client resources in each of these is different:

  • Model 1: Sellafield client oversight - Sellafield, as 'the Client', performs an oversight and assurance role, with delivery being solely conducted by the Contractor
  • Model 2: Integrated teams - Sellafield and the Contractor will work as integrated teams to deliver the scope of work (as set out in a specific Call-Off Contract). These teams may be Sellafield led or Contractor led and may be for a single aspect of the delivery lifecycle only, e.g. design, or right across the full lifecycle. Sellafield will still perform an Intelligent Client role under these arrangements in addition to their role as Intelligent Customer.

Intelligent Customer is defined as the capability of an organisation to understand where and when work is needed; specify what needs to be done; understand and set suitable standards; supervise and control the work; and review, evaluate and accept the work carried out on its behalf.

Awarded supplier

Supplier
The Decommissioning Alliance II
Award value
£4,509,717
Award date
19 December 2025

Contact

Address
Birchwood Park Avenue, Warrington, WA3 6GR
Contact name
Mark Jacobson

Identifiers

Buyer reference
CF-0275100D4L000000iAvzUAE
Notice ID
b5aca70e-af89-40b6-84bb-6a1a76ed322c-881946
OCID
ocds-b5fd17-3fdc7118-1323-4f37-9586-8a0a715ab9bc

Explore related tenders

External ID: cf-ocds-b5fd17-3fdc7118-1323-4f37-9586-8a0a715ab9bc • Added 29 April 2026