Published date: 3 February 2026

Awarded contract - This means that the contract has been awarded to a supplier.


Closing: 15 December 2025, 4pm

Contract summary

Industry

  • General management consultancy services - 79411000

  • Decommissioning services - 98391000

Location of contract

CA20 1PG

Value of contract

£4,509,716.73 to £10,000,000

Procurement reference

CF-0275100D4L000000iAvzUAE

Published date

3 February 2026

Closing date

15 December 2025

Closing time

4pm

Contract start date

19 December 2025

Contract end date

26 September 2026

Contract type

Service contract

Procedure type

Call-off from a framework agreement

A mini-competition or direct purchase from a pre-established framework agreement.

Contract is suitable for SMEs?

No

Contract is suitable for VCSEs?

No

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.

Award information

Awarded date

19 December 2025

Contract start date

19 December 2025

Contract end date

26 September 2026

Total value of contract

£4,509,716.73

This contract was awarded to 1 supplier.

The Decommissioning Alliance II

Address

Pillar House, Westlakes Science Park, Moor Row, Church Stretton, CA24 3JZ

Reference

None

About the buyer

Contact name

Mark Jacobson

Address

Birchwood Park Avenue
Warrington
WA3 6GR
GB

Email

mark.t.jacobson@sellafieldsites.com