Award

Technical Advisor to the DESNZ Sizewell C team

DESNZ

This public procurement record has 1 release in its history.

Award

18 Dec 2025 at 16:38

Award Notice
Summary of the contracting process

The Department for Energy Security and Net Zero (DESNZ) has awarded a contract for technical advisory services related to the Sizewell C project. The award has been given to Mott MacDonald Limited, a large consultancy firm. This contract, assessed under CPV classification 71621000 for technical analysis or consultancy services, is focused on the oversight of the Sizewell C project during its post-Final Investment Decision and Financial Close phases. The procurement method used was a selective call-off from a framework agreement, and the contract period began on 1st December 2025 and will end on 30th November 2028. This contract has been valued at £4,840,000, with an award of £3,640,000. Although this tender is completed, it highlighted DESNZ's commitment to engaging specialised services for strategic energy projects.

The technical advisory contract for the Sizewell C project presents avenues for businesses that specialise in consultancy and technical analysis within the energy sector to showcase their expertise in large-scale infrastructure projects. This opportunity is particularly suited for large firms capable of delivering comprehensive and specialised services for significant energy projects. As the advisory services are aimed at supporting government roles in shareholder and policy sponsor capacities, businesses with experience in governmental and regulatory environments will find enhanced prospects for growth and increased visibility as key players in national energy initiatives. Additionally, this project encompasses a broad geographic scope, including the UK and various international locations, demonstrating the potential for cross-border cooperation and influence.

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Notice Information

Notice Title

Technical Advisor to the DESNZ Sizewell C team

Notice Description

The Department for Energy Security and Net Zero has awarded this Contract for the supply of Technical Advisory Services in respect of the Sizewell C project. The Supplier will support HMG in its oversight as Shareholder and Policy Sponsor of the Sizewell C Project in the post-Final Investment Decision and Financial Close phases of the project.

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-b5fd17-279c9810-3c46-440e-b2cc-6109fbbb7402
Publication Source
Contracts Finder
Latest Notice
https://www.contractsfinder.service.gov.uk/Notice/053a7637-19ba-4255-aaed-e1699cdf54ed
Current Stage
Award
All Stages
Award

Procurement Classification

Notice Type
Award Notice
Procurement Type
Framework
Procurement Category
Services
Procurement Method
Selective
Procurement Method Details
Call-off from a framework agreement
Tender Suitability
Not specified
Awardee Scale
Large

Common Procurement Vocabulary (CPV)

CPV Divisions

71 - Architectural, construction, engineering and inspection services

CPV Codes

71621000 - Technical analysis or consultancy services

Notice Value(s)

Tender Value
£4,840,000 £1M-£10M
Lots Value
Not specified
Awards Value
£3,640,000 £1M-£10M
Contracts Value
Not specified

Notice Dates

Publication Date
18 Dec 20252 months ago
Submission Deadline
7 Oct 2025Expired
Future Notice Date
Not specified
Award Date
1 Dec 20252 months ago
Contract Period
1 Dec 2025 - 30 Nov 2028 3-4 years
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Not Specified
Awards Status
Active
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
DESNZ
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
LONDON
Postcode
SW1A 2AW
Post Town
South West London
Country
England
Major Region (ITL 1)
TLI London
Basic Region (ITL 2)
TLI3 Inner London - West
Small Region (ITL 3)
TLI35 Westminster and City of London
Delivery Location
Not specified
Local Authority
Westminster
Electoral Ward
St James's
Westminster Constituency
Cities of London and Westminster

Supplier Information

Number of Suppliers
1
Supplier Name

MOTT MACDONALD

Further Information

Open Contracting Data Standard (OCDS)

View full OCDS Record for this contracting process

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts. 

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