Back to search
Find a Tender
AWARD
Complete
Owner's Engineer
Published 30 Apr 2026
30 Apr 2026
- Primary CPV
-
71300000 *
Engineering services
- Location
- 🇬🇧 Westminster, London
- Value
- £300,000,000
- Contract
-
14 years Duration
23/04/2026 23/04/2040
- Contract Types
-
71 *Architectural, engineering & inspection...Full CPV Breakdown
- SME suitable
- Not stated
Publisher Address
Department For Energy Security and Net Zero, London, SW1A 2EG, United Kingdom · UKI32
Contact
Award Criteria
Not specified
Related tenders
GREAT BRITISH ENERGY - NUCLEAR
All notices from this publisher Same CPV code
71300000 *
All notices with this CPV code
Reference: prj_4553, itt_2242
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.
Awarded to
Full CPV breakdown
- 71300000 — Engineering services (primary)
Notice details
- Buyer type
- Central government
- Competition
- Restricted / competitive (suppliers are shortlisted first)
- Contract type
- Services
- Winning supplier
- Large company
- Procurement method
- Competitive flexible procedure
- Main category
- Services
- Legal basis
- UKPGA 2023/54
- Notice status
- Complete
- Award status
- Active
- Language
- EN
- Published
- 30 Apr 2026 13:49
- OCID
- ocds-h6vhtk-0505a0
- Notice ID
- prj_4553, itt_2242
Organisations on this notice
Supplier Large
305 Bridgewater Place, Warrington, WA3 6XF, United Kingdom
AC•••••
Upgrade to Pro to see
GB-COH 01120437
CAVENDISH NUCLEAR LIMITED
Supplier Large
Full notice record
78 detailsEverything the publisher included in this notice, organised by section. Contact details hidden: upgrade to Pro to see
Organisations
| Party 1 › Name | GREAT BRITISH ENERGY - NUCLEAR |
| Party 1 › Address › Street | Department For Energy Security and Net Zero |
| Party 1 › Address › Town / city | London |
| Party 1 › Address › Postcode | SW1A 2EG |
| Party 1 › Address › Country | GB |
| Party 1 › Address › Country | United Kingdom |
| Party 1 › Address › Region (NUTS) | UKI32 |
| Party 1 › Role | buyer |
| Party 1 › Classification › Description | Public authority - central government |
| Party 2 › Name | AMENTUM CLEAN ENERGY LIMITED |
| Party 2 › Address › Street | 305 Bridgewater Place |
| Party 2 › Address › Town / city | Warrington |
| Party 2 › Address › Postcode | WA3 6XF |
| Party 2 › Address › Country | GB |
| Party 2 › Address › Country | United Kingdom |
| Party 2 › Address › Region (NUTS) | UKD61 |
| Party 2 › Role | supplier |
| Party 2 › Link | http://www.amentum.com |
| Party 2 › Business size | large |
| Party 2 › VCSEs | No |
| Party 2 › Public service mission organisation | No |
| Party 2 › Sheltered workshop | No |
| Party 3 › Name | CAVENDISH NUCLEAR LIMITED |
| Party 3 › Address › Street | 33 Wigmore Street |
| Party 3 › Address › Town / city | London |
| Party 3 › Address › Postcode | W1U 1QX |
| Party 3 › Address › Country | GB |
| Party 3 › Address › Country | United Kingdom |
| Party 3 › Address › Region (NUTS) | UKI32 |
| Party 3 › Role | supplier |
| Party 3 › Link | https://www.cavendishnuclear.com/ |
| Party 3 › Business size | large |
| Party 3 › VCSEs | No |
| Party 3 › Public service mission organisation | No |
| Party 3 › Sheltered workshop | No |
Buyer
| Name | GREAT BRITISH ENERGY - NUCLEAR |
Tender
| Title | Owner's Engineer |
| Status | complete |
| Procedure type | selective |
| Procedure | Competitive flexible procedure |
| Lot › Status | complete |
| Document › Document type | Conflict of interest |
| Document › Description | Not published |
Awards
| Status | active |
| Category | services |
| Supplier › Supplier 1 › Name | AMENTUM CLEAN ENERGY LIMITED |
| Supplier › Supplier 2 › Name | CAVENDISH NUCLEAR LIMITED |
| Item › CPV › CPV 1 › Description | Engineering services |
| Item › CPV › CPV 2 › Description | Construction-related services |
| Item › CPV › CPV 3 › Description | Technical testing, analysis and consultancy services |
| Item › CPV › CPV 4 › Description | Safety consultancy services |
| Item › Delivery › Region (NUTS) | UK |
| Item › Delivery › Country | GB |
| Item › Delivery › Country | United Kingdom |
Contracts
| Title | Owner's Engineer |
| Status | active |
| Contract period › Start | 23 Apr 2026 |
| Contract period › End | 23 Apr 2040 |
| Contract period › Can be extended to | 20 Oct 2041 |
| Can be renewed | Yes |
| Renewal › Description | 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. |
| Value › Value incl. VAT | £360,000,000 |
| Value › Value | £300,000,000 |
| Value › Currency | GBP |
| Above threshold | Yes |
| Signed | 31 Mar 2026 |
| Agreed Metrics › Agreed Metric 1 › Title | Social Value |
| Agreed Metrics › Agreed Metric 1 › Observations › Contract period › Duration In Months | 1 |
| Agreed Metrics › Agreed Metric 2 › Title | Deliverable Quality |
| Agreed Metrics › Agreed Metric 2 › Description | % of deliverables received by the submission deadline and accepted by the Client (accepted with no significant changes) against the total deliverables with submission deadlines within Measurement Period. |
| Agreed Metrics › Agreed Metric 2 › Observations › Contract period › Duration In Months | 1 |
| Agreed Metrics › Agreed Metric 3 › Title | Availability of Core Team |
| Agreed Metrics › Agreed Metric 3 › Description | Availability of Core Team staff (Actual FTE / Baseline FTE). |
| Agreed Metrics › Agreed Metric 3 › Observations › Contract period › Duration In Months | 1 |
| Document › Document type | Contract notice |
| Document › Description | Contract details notice on Find a Tender |
| Document › Link | https://www.find-tender.service.gov.uk/Notice/039929-2026 |
| Document › Published | 30 Apr 2026 |