Contract

Management of the Nuclear Safeguards Programme

  • DESNZ & DSIT Group Commercial

F20: Modification notice

Notice identifier: 2025/S 000-060233

Procurement identifier (OCID): ocds-h6vhtk-02a03b (view related notices)

Published 26 September 2025, 3:04pm



Section one: Contracting authority/entity

one.1) Name and addresses

DESNZ & DSIT Group Commercial

3-8 Whitehall Place

London

SW1A 2EG

Email

Adejumoke.Adetunji@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

Management of the Nuclear Safeguards Programme

two.1.2) Main CPV code

  • 98113100 - Nuclear safety services

two.1.3) Type of contract

Services

two.2) Description

two.2.1) Title

Management of the Nuclear Safeguards Programme

two.2.2) Additional CPV code(s)

  • 71356000 - Technical services

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:

This is a variation to an existing contract between United Kingdom National Nuclear Laboratory (UKNNL) and the Department for Energy, Security and Net Zero (DESNZ).

The contract provides management services for the UK’s Nuclear Safeguards Programme (NSP) to Department for Energy Security and Net Zero (DESNZ) and International Atomic Energy Agency (IAEA). DESNZ is amending the contract due to increased activities under the existing scope. The additional work has become necessary due to extended project timelines. The variation is composed of an additional year extension and a 40% increase in value under Regulation 72 (1) (b) of the PCR 2015.

- Original award value: £9,750,000 excluding VAT. End date (minus time extensions) 31st March 2025.

- Variation: £3,900,100 excluding VAT. End date 31st March 2026.

- Modified award value: £13,650,100 excluding VAT

Please see original notice here: https://www.find-tender.service.gov.uk/Notice/006345-2021?origin=SearchResults&p=1

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

Start date

1 April 2021

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: 2021/S 000-006345


Section five. Award of contract/concession

Contract No

Variation 1

Title

Management of the Nuclear Safeguards Programme

five.2) Award of contract/concession

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

9 March 2021

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

United Kingdom National Nuclear Laboratory

Chadwick House, Birchwood Park

Warrington

WA3 6AE

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: £9,750,000


Section six. Complementary information

six.4) Procedures for review

six.4.1) Review body

Department for Energy Security and Net Zero (DESNZ)

London

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

  • 98113100 - Nuclear safety services

seven.1.2) Additional CPV code(s)

  • 71356300 - Technical support services

seven.1.3) Place of performance

NUTS code
  • UK - United Kingdom

seven.1.4) Description of the procurement:

The contract provides management services for the UK’s Nuclear Safeguards Programme (NSP) to Department for Energy Security and Net Zero (DESNZ) and International Atomic Energy Agency (IAEA).

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

Start date

1 April 2021

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:

£13,650,100

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

United Kingdom National Nuclear Laboratory

Chadwick House, Birchwood Park

Warrington

WA3 6AE

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: £9,750,000 excluding VAT. End date (minus time extensions) 31st March 2025.

- Variation: £3,900,100 excluding VAT. End date 31st March 2026.

- Modified award value: £13,650,100 excluding VAT

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:

DESNZ is amending the contract due to increased activities under the existing scope. The additional work has become necessary due to extended project timelines.

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: £9,750,000

Total contract value after the modifications

Value excluding VAT: £13,650,100