Scope
Reference
itt_2242, prj_4553
Description
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. 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.
In accordance with section 51 of the Procurement Act 2023, GBE-N will observe a standstill period. Whilst the mandatory standstill period concludes on the 18th February, to ensure 8 full Working Days the standstill period will conclude at 14:30 19th February.
Contract 1. Owner's Engineer
Supplier
Contract value
- £300,000,000 excluding VAT
- £360,000,000 including VAT
Above the relevant threshold
Award decision date
9 February 2026
Date assessment summaries were sent to tenderers
9 February 2026
Standstill period
- End: 18 February 2026
- 8 working days
Earliest date the contract will be signed
6 March 2026
Contract dates (estimated)
- 6 March 2026 to 6 March 2040
- Possible extension to 2 September 2041
- 15 years, 5 months, 28 days
Description of possible extension:
The duration of the Owner's Engineer contract will be linked to the Completion Date of the Technology Partner contract. Therefore, the extension provision is not linked to a specific date. The intention is that the OE will support the Client to completion of the first fuel cycle.
Main procurement category
Services
CPV classifications
- 71300000 - Engineering services
- 71500000 - Construction-related services
- 71600000 - Technical testing, analysis and consultancy services
- 79417000 - Safety consultancy services
Contract locations
- UK - United Kingdom
Information about tenders
- 6 tenders received
- 6 tenders assessed in the final stage:
- 1 submitted by small and medium-sized enterprises (SME)
- 1 submitted by voluntary, community and social enterprises (VCSE)
- 1 supplier awarded contracts
- 5 suppliers unsuccessful (details included for contracts over £5 million)
Unsuccessful suppliers
Submission
Submission type
Requests to participate
Procedure
Procedure type
Competitive flexible procedure
Suppliers
AFRY SOLUTIONS UK LIMITED
- Companies House: 01192469
- Public Procurement Organisation Number: PLDG-4388-CJYH
920 Birchwood Boulevard
Warrington
WA3 7QS
United Kingdom
Website: http://www.afry.com
Region: UKD61 - Warrington
Small or medium-sized enterprise (SME): Yes
Voluntary, community or social enterprise (VCSE): No
AMENTUM CLEAN ENERGY LIMITED
- Companies House: 01120437
- Public Procurement Organisation Number: PBDC-7744-BTPG
305 Bridgewater Place
Warrington
WA3 6XF
United Kingdom
Email: ACELSales@global.amentum.com
Website: http://www.amentum.com
Region: UKD61 - Warrington
Small or medium-sized enterprise (SME): No
Voluntary, community or social enterprise (VCSE): No
Supported employment provider: No
Public service mutual: No
Associated people/organisations:
Cavendish Nuclear (UJV Partner)
Companies House Identifier: 03975999
Additional Identifier Public Procurement Organisation Number: PJRC-9195-NWZW
Street address: 33 Wigmore Street, London, W1U 1QX, United Kingdom
Website: https://www.cavendishnuclear.com/
Email: portals@cavendishnuclear.com
None of the above (SME, VCSE etc.)
Contract 1. Owner's Engineer
LLOYD'S REGISTER EMEA
- Companies House: IP29592R
- Public Procurement Organisation Number: PGQQ-3498-WYBD
71 Fenchurch Street
London
EC3M 4BS
United Kingdom
Website: https://www.lr.org/en/
Region: UKI31 - Camden and City of London
Small or medium-sized enterprise (SME): No
Voluntary, community or social enterprise (VCSE): Yes
MOTT MACDONALD LIMITED
- Companies House: 01243967
- Public Procurement Organisation Number: PMRR-1398-DNDL
10 Fleet Place
London
EC4M 7RB
United Kingdom
Website: http://www.mottmac.com
Region: UKI31 - Camden and City of London
Small or medium-sized enterprise (SME): No
Voluntary, community or social enterprise (VCSE): No
OVE ARUP & PARTNERS LIMITED
- Companies House: 01312453
- Public Procurement Organisation Number: PZJN-8211-DBBV
8 Fitzroy Street
London
W1T 4BJ
United Kingdom
Website: http://www.arup.com
Region: UKI31 - Camden and City of London
Small or medium-sized enterprise (SME): No
Voluntary, community or social enterprise (VCSE): No
TRACTEBEL ENGINEERING (FRANCE)
- Companies House: FC036592
- Public Procurement Organisation Number: PVRT-8584-BDPY
7 Rue Emmy Noether
Saint Ouen
93400
France
Website: https://tractebel-engie.com/en
Small or medium-sized enterprise (SME): No
Voluntary, community or social enterprise (VCSE): No
Contracting authority
GREAT BRITISH ENERGY - NUCLEAR
- Companies House: 05027024
- Public Procurement Organisation Number: PRCJ-2655-YDML
Department For Energy Security and Net Zero
London
SW1A 2EG
United Kingdom
Region: UKI32 - Westminster
Organisation type: Public authority - central government