Estimated Value
Up to £300,000,000
Deadline
9 July 2025
Published
7 August 2026
Type
Not specified
Overview
The OE will provide essential independent assurance to the Intelligent Customer and Intelligent Client for the Small Modular Reactor project. This will support the deployment of first-of-a-kind nuclear technology in the UK and facilitate GBE-N's goal of reaching a Final Investment Decision.
In particular, the OE will act as a 'client friend' to the Intelligent Customer and Intelligent Client and provide competent resource to undertake specification, oversight, audit, review and advice for decisions relating to design, scope, budget, risk, delivery and contract compliance. It will also play the role of subject matter expert to deliver independent technical and delivery Line of Defence 2 assurance on major design and build contracts.
The maximum total contract value is £300m. However, it is not possible to predict an exact outturn value at this stage due to the length of the contract and inherent uncertainties in scope, which drive variability in the volume of work instructed.
Additional details
In addition, progression through design stages and associated milestones or gates will determine the timing and extent of services required, potentially influencing the overall contract value over time. As envisaged in the tender notice, the duration of the OE contract will depend on matters agreed with the SMR Technology Partner. The current assumption remains that the OE contract will have a 14-year term, but a completion date will be set during the term of the contract in accordance with its terms and to reflect the term of the SMR Technology Partner contract.
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Award Details
AMENTUM CLEAN ENERGY LIMITED
£300,000,000
CAVENDISH NUCLEAR LIMITED
£300,000,000
Likely incumbents
Suppliers who won similar work from this buyer in the last 5 years.
- 1
Deloitte LLP
£8m
total awarded
- 2
COGENT SKILLS SERVICES LTD
£480,260
total awarded
- 3
One Two Agency Ltd
£60,000
total awarded
- 4
Decision Analysis Service Limited
£98,820
total awarded
- 5
Heales Health Services
£300,000
total awarded
Deloitte LLP 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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Buyer Profile
GREAT BRITISH NUCLEARKey Dates
Published
7 August 2026
Submission deadline
9 July 2025
Notice type
contractAmendment
Source
find a tender
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