Contract

Legal Services for Sizewell C

  • Department for Energy Security and Net Zero

F20: Modification notice

Notice identifier: 2025/S 000-044579

Procurement identifier (OCID): ocds-h6vhtk-04b189 (view related notices)

Published 31 July 2025, 9:42am



Section one: Contracting authority/entity

one.1) Name and addresses

Department for Energy Security and Net Zero

3-8 Whitehall Place

London

SW1A 2BD

Email

butch.vraniqi@energysecurity.gov.uk

Country

United Kingdom

Region code

UK - United Kingdom

Internet address(es)

Main address

https://www.gov.uk/government/organisations/department-for-energy-security-and-net-zero


Section two: Object

two.1) Scope of the procurement

two.1.1) Title

Legal Services for Sizewell C

two.1.2) Main CPV code

  • 79100000 - Legal services

two.1.3) Type of contract

Services

two.2) Description

two.2.3) Place of performance

NUTS codes
  • UK - United Kingdom

two.2.4) Description of the procurement at the time of conclusion of the contract:

The scope of the contract is for the provision of legal services regarding legal and commercial matters concerning the Sizewell C project, as well as the role of DESNZ as project sponsor and shareholder.

two.2.7) Duration of the contract, framework agreement, dynamic purchasing system or concession

Start date

1 December 2023

End date

31 March 2026

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No


Section four. Procedure

four.2) Administrative information

four.2.1) Contract award notice concerning this contract

Notice number: 2024/S 000-034732


Section five. Award of contract/concession

Contract No

Modification two

Title

Legal services for Sizewell C

five.2) Award of contract/concession

five.2.1) Date of conclusion of the contract/concession award decision:

1 December 2023

five.2.2) Information about tenders

The contract/concession has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor/concessionaire

Linklaters LLP

One Silk St

London

EC2Y 8HQ

Country

United Kingdom

NUTS code
  • UK - United Kingdom
The contractor/concessionaire is an SME

No

five.2.4) Information on value of the contract/lot/concession (at the time of conclusion of the contract;excluding VAT)

Total value of the procurement: £15,960,000


Section six. Complementary information

six.4) Procedures for review

six.4.1) Review body

N/A

N/A

Country

United Kingdom


Section seven: Modifications to the contract/concession

seven.1) Description of the procurement after the modifications

seven.1.1) Main CPV code

  • 79100000 - Legal services

seven.1.3) Place of performance

NUTS code
  • UK - United Kingdom

seven.1.4) Description of the procurement:

This is a modification to an existing contract between the Department for Energy Security and Net Zero and Linklaters LLP. The scope of the contract is for the provision of legal services regarding legal and commercial matters concerning the Sizewell C project, as well as the role of DESNZ as project sponsor and shareholder.

Additional services have become necessary due to extended project timelines. The supplier's services are essential to the achievement of the SZC Final Investment Decision and progression of the programme.

The variation is composed of an eight-month extension in time and a 50% extension in value under Regulation 72 (1) (b) and 72 (2) of the Public Contracts Regulations 2015.

Original award value: £15,960,000 (excl. VAT). 01/12/2023-30/09/2024.

Modification one (Sep-24): £7,980,000 (excl. VAT). 01/12/2023-31/07/2025. Modified contract value: £23,940,000.

Modification two (Jul-25): £7,980,000 (exlc. VAT). 01/12/2023-31/03/2026. Modified contract value: £31,920,000.

seven.1.5) Duration of the contract, framework agreement, dynamic purchasing system or concession

Start date

1 December 2023

End date

31 March 2026

seven.1.6) Information on value of the contract/lot/concession (excluding VAT)

Total value of the contract/lot/concession:

£31,920,000

seven.1.7) Name and address of the contractor/concessionaire

Linklaters LLP

One Silk St

London

EC2Y 8HQ

Country

United Kingdom

NUTS code
  • UK - United Kingdom
The contractor/concessionaire is an SME

No

seven.2) Information about modifications

seven.2.1) Description of the modifications

Nature and extent of the modifications (with indication of possible earlier changes to the contract):

Original award value (01/12/2023): £15,960,000 (excl. VAT). End date: 30/09/2024 (+ two optional 3-month extensions).

Modification one (26/09/2024): £7,980,000 (excl. VAT) + 10-month extension. New end date: 31/07/2025. Modified contract value: £23,940,000. DESNZ amended the contract to increase the scope of Linklaters' services in relation to the Sizewell C capital raise process.

Modification two (16/07/2025): £7,980,000 (excl. VAT) + 8-month extension. New end date: 31/03/2026. Modified contract value: £31,920,000. DESNZ increased the duration and value of the contract to enable access to Linklaters' services up to and beyond the Sizewell C Final Investment Decision. DESNZ have modified the contract as above as a result of extended project timelines.

seven.2.2) Reasons for modification

Need for additional works, services or supplies by the original contractor/concessionaire.

Description of the economic or technical reasons and the inconvenience or duplication of cost preventing a change of contractor:

Additional services are required towards the completion of the SZC capital raise process due to extended project timeframes. Any change in contractor would cause significant inconvenience and substantial duplication of costs because the incumbent is uniquely placed to advise HMG and the project is at a critical stage close to completion.

seven.2.3) Increase in price

Updated total contract value before the modifications (taking into account possible earlier contract modifications, price adaptions and average inflation)

Value excluding VAT: £23,940,000

Total contract value after the modifications

Value excluding VAT: £31,920,000