2
Value£300,000,000
completeFind a Tender · contract Amendment
Owner's Engineer
BuyerGREAT BRITISH ENERGY - NUCLEAR
Statuscomplete
DeadlineNot published
ValueValue not published
Published7 Aug 2026
What is being bought
The source has not published a summary for this record.
Comparable-procurement analytics
No usable CPV category has been published, so a comparable market set cannot yet be built.
Procurement strategy & market signals
Framework agreementNot published
Dynamic purchasing systemNot published
Competitive procurementNot published
Recurring requirementNot published
Procurement method rationaleNot published
Rationale classificationsNot published
Special regimeNot published
Covered byNot published
Submission policyNot published
Selection criteriaNot published
Risk detailsNot published
Planning & early market engagement
BudgetNot published
No-engagement rationaleNot published
Planning documents0
Planning milestones0
No planning milestones published.
Related procurements
No linked framework, prior procurement or reprocurement published.
Contracts
Documents & submission route
- Not published
Source data inventory
Diagnostic view. “Not published” means this current release does not provide a value.
| OCID | ocds-h6vhtk-0505a0 |
|---|---|
| Latest release ID | 075438-2026 |
| Latest release timestamp | Fri Aug 07 2026 15:13:25 GMT+0000 (Coordinated Universal Time) |
| Source | find-a-tender |
| Official notice URL | Not published |
| Tender status | Not published |
| Procurement method | Not published |
| Procurement method details | Not published |
| Main procurement category | Not published |
| Above threshold | Not published |
| Legal basis | 2023/54 |
| Tender period: start | Not published |
| Tender period: end | Not published |
| Expression of interest deadline | Not published |
| Enquiry deadline | Not published |
| Award period: start | Not published |
| Award period: end | Not published |
| Submission method details | Not published |
| Submission languages | Not published |
| Electronic catalogue policy | Not published |
| Total tender value | Not published |
| Tender lots in source | 0 |
| Tender items in source | 0 |
| Tender documents in source | 1 |
| Awards in latest release | 0 |
| Contracts in latest release | 1 |
| Parties in latest release | 1 |
Notice history
| Date | Event | Reference |
|---|---|---|
| 7 Aug 2026 | contractAmendment | 075438-2026 |
| 30 Apr 2026 | award, contract | 039929-2026 |
| 9 Feb 2026 | award, contract | 011436-2026 |
| 2 Jul 2025 | tenderUpdate | 036644-2025 |
| 17 Jun 2025 | tenderUpdate | 032797-2025 |
| 4 Jun 2025 | tenderUpdate | 030038-2025 |
| 3 Jun 2025 | tender | 029471-2025 |
| 12 May 2025 | planning | 020508-2025 |
| 30 Apr 2025 | planningUpdate | 017813-2025 |
| 28 Apr 2025 | planningUpdate | 017244-2025 |
| 22 Apr 2025 | planning | 016291-2025 |
| 22 Apr 2025 | planning | 016232-2025 |
All source data
Unmodified official OCDS data retained by Tenderline for this procurement process.
Complete current OCDS release JSON
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}Complete JSON history (12 releases)
7 Aug 2026 · 075438-2026 · contractAmendment
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}30 Apr 2026 · 039929-2026 · award, contract
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}9 Feb 2026 · 011436-2026 · award, contract
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},
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},
"details": {
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},
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},
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"url": "http://www.mottmac.com",
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"country": "FR",
"locality": "Saint Ouen",
"postalCode": "93400",
"countryName": "France",
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},
"details": {
"url": "https://tractebel-engie.com/en",
"vcse": false,
"scale": "large"
},
"identifier": {
"id": "FC036592",
"scheme": "GB-COH"
},
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}
]
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{
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"tenderer"
],
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"country": "GB",
"locality": "Warrington",
"postalCode": "WA3 6XF",
"countryName": "United Kingdom",
"streetAddress": "305 Bridgewater Place"
},
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"scale": "large",
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"publicServiceMissionOrganization": false
},
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"id": "01120437",
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},
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},
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"id": "PBDC-7744-BTPG",
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}2 Jul 2025 · 036644-2025 · tenderUpdate
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"value": {
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"awardCriteria": {
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"description": "Please refer to the Procurement Specific Questionnaire for a set of Economic and Financial Standing requirements, and conflicts of interest requirements\nAll documentation can be found on Jaggaer. All communications regarding the procurement will be held via Jaggaer. All responses will be submitted via Jaggaer."
},
{
"type": "technical",
"description": "Please refer to the Procurement Specific Questionnaire for a set of technical and programme delivery skills and capabilities.\nAll documentation can be found on Jaggaer. All communications regarding the procurement will be held via Jaggaer. All responses will be submitted via Jaggaer."
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},
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{
"id": "036644-2025",
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}
],
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"uri": "https://www.legislation.gov.uk/ukpga/2023/54/contents",
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},
"enquiryPeriod": {
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},
"aboveThreshold": true,
"submissionTerms": {
"languages": [
"en"
],
"electronicSubmissionPolicy": "allowed"
},
"procurementMethod": "open",
"mainProcurementCategory": "services",
"submissionMethodDetails": "https://beisgroup.ukp.app.jaggaer.com\nThe JAGGAER eSourcing Portal may be accessed at https://beisgroup.ukp.app.jaggaer.com/\nThis is where submissions will be made, all communications between GBN and Tenderers will occur, and is where all official PSQ documentation will be issued.\nFor further assistance with regards registering on the Jaggaer eSourcing Portal, please consult the available help.\nPhone: 08000 698 632\nEmail: customersupport@jaggaer.com",
"procurementMethodDetails": "Competitive flexible procedure"
},
"parties": [
{
"id": "GB-COH-05027024",
"name": "GREAT BRITISH NUCLEAR",
"roles": [
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"address": {
"region": "UKI32",
"country": "GB",
"locality": "London",
"postalCode": "SW1A 2EG",
"countryName": "United Kingdom",
"streetAddress": "GBN Department For Energy Security and Net Zero"
},
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"identifier": {
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"contactPoint": {
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},
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{
"id": "PRCJ-2655-YDML",
"scheme": "GB-PPON"
}
]
}
],
"language": "en",
"initiationType": "tender"
}17 Jun 2025 · 032797-2025 · tenderUpdate
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}3 Jun 2025 · 029471-2025 · tender
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}12 May 2025 · 020508-2025 · planning
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}30 Apr 2025 · 017813-2025 · planningUpdate
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}22 Apr 2025 · 016291-2025 · planning
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"features": "The Owner's Engineer (OE) will be procured using the Competitive Flexible Procedure outlined in the Procurement Act 2023 (the Act).\nThere will be two stages in the OE procurement. In the first stage, tenderers will need to respond to the Procurement Specific Questionnaire (PSQ), which will include conditions of participation. The PSQ will cover topics including, but not limited to, conflicts of interest, economic and financial standing and the tenderer's ability to provide the technical and programme capabilities listed later in this notice. The capabilities set out in the technical ability conditions of participation section below can be delivered in various ways, including (but not limited to) by a tenderer and its supply chain, a joint venture, a special purpose vehicle or a consortium. Please note that while GBN considers this list of capabilities to be comprehensive, it reserves the right to change them (and any other information provided in this notice) by the time of launching the OE procurement.\nIf the response submitted by a tenderer as part of the first stage of the procurement satisfies all the relevant conditions, the tenderer will be invited to submit a tender as part of the second stage of the procurement. GBN will then assess the tenderer's proposals against questions covering Technical, Commercial and Social Value criteria. Please note that GBN reserves the right to refine its award criteria during the procurement process."
},
"legalBasis": {
"id": "2023/54",
"uri": "https://www.legislation.gov.uk/ukpga/2023/54/contents",
"scheme": "UKPGA"
},
"awardPeriod": {
"endDate": "2026-03-12T23:59:59Z"
},
"description": "Great British Nuclear) is aiming to procure up to two OEs as part of its Small Modular Reactor (SMR) programme. \nThe OE will provide essential independent assurance to the Intelligent Customer and Intelligent Client for the relevant SMR project. This will support the deployment of first-of-a-kind nuclear technology in the UK and facilitate GBN's goal of reaching a Final Investment Decision(s) for up to two SMR projects. 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. \nEach tenderer will be expected to be able to evidence how it will provide all of the capabilities outlined in the Technical ability section of the questions relating to the conditions of participation. \nThe total contract value of £600m stated in this notice assumes that GBN will award two OE contracts (one for each planned SMR project), each with a total contract value of up to £300m. The actual value will depend on a number of factors. GBN reserves the right not to proceed with two SMR projects. \nThe duration of the OE contract(s) is not yet confirmed. This notice envisages a 14-year term, but please note that GBN will set a completion date once the outcome of the SMR Technology Partner procurement is known.",
"tenderPeriod": {
"endDate": "2025-09-19T23:59:59+01:00"
},
"communication": {
"futureNoticeDate": "2025-06-02T23:59:59+01:00"
},
"aboveThreshold": true,
"submissionTerms": {
"languages": [
"en"
],
"electronicSubmissionPolicy": "allowed"
},
"procurementMethod": "open",
"mainProcurementCategory": "services",
"procurementMethodDetails": "Competitive flexible procedure"
},
"parties": [
{
"id": "GB-COH-05027024",
"name": "GREAT BRITISH NUCLEAR",
"roles": [
"buyer"
],
"address": {
"region": "UKI32",
"country": "GB",
"locality": "London",
"postalCode": "SW1A 2EG",
"countryName": "United Kingdom",
"streetAddress": "Department For Energy Security & Net Zero"
},
"details": {
"classifications": [
{
"id": "publicAuthorityCentralGovernment",
"scheme": "UK_CA_TYPE",
"description": "Public authority - central government"
}
]
},
"identifier": {
"id": "05027024",
"scheme": "GB-COH"
},
"contactPoint": {
"email": "commercialcdp@greatbritishnuclear.uk"
},
"additionalIdentifiers": [
{
"id": "PRCJ-2655-YDML",
"scheme": "GB-PPON"
}
]
}
],
"language": "en",
"planning": {
"documents": [
{
"id": "016291-2025",
"url": "https://www.find-tender.service.gov.uk/Notice/016291-2025",
"format": "text/html",
"noticeType": "UK3",
"description": "Planned procurement notice on Find a Tender",
"documentType": "plannedProcurementNotice",
"datePublished": "2025-04-22T15:26:37+01:00"
}
]
},
"initiationType": "tender"
}22 Apr 2025 · 016232-2025 · planning
{
"id": "016232-2025",
"tag": [
"planning"
],
"date": "2025-04-22T13:42:16+01:00",
"ocid": "ocds-h6vhtk-0505a0",
"buyer": {
"id": "GB-COH-05027024",
"name": "GREAT BRITISH NUCLEAR"
},
"tender": {
"id": "ocds-h6vhtk-0505a0",
"lots": [
{
"id": "1",
"status": "planned",
"suitability": {
"sme": true
},
"contractPeriod": {
"endDate": "2040-03-26T23:59:59Z",
"startDate": "2026-03-26T00:00:00Z"
}
}
],
"items": [
{
"id": "1",
"relatedLot": "1",
"deliveryAddresses": [
{
"region": "UK",
"country": "GB",
"countryName": "United Kingdom"
}
],
"additionalClassifications": [
{
"id": "71300000",
"scheme": "CPV",
"description": "Engineering services"
},
{
"id": "71500000",
"scheme": "CPV",
"description": "Construction-related services"
},
{
"id": "71600000",
"scheme": "CPV",
"description": "Technical testing, analysis and consultancy services"
},
{
"id": "79417000",
"scheme": "CPV",
"description": "Safety consultancy services"
}
]
}
],
"title": "Owner's Engineer",
"value": {
"amount": 600000000,
"currency": "GBP",
"amountGross": 720000000
},
"status": "planned",
"legalBasis": {
"id": "2023/54",
"uri": "https://www.legislation.gov.uk/ukpga/2023/54/contents",
"scheme": "UKPGA"
},
"description": "An early market engagement exercise was undertaken by Great British Nuclear (GBN), which is aiming to procure up to two Owner's Engineers (OE) as part of its Small Modular Reactor (SMR) programme. The OE(s) will be procured using the Competitive Flexible Procedure outlined in the Procurement Act 2023 (the Act). The purpose of this Preliminary Market Engagement (PME) Notice is to provide information to the market on the market engagement activities GBN has carried out in connection with its intention to procure up to two OEs. The Act permits contracting authorities to publish a PME Notice to notify potential suppliers that PME activities have taken place.\nThe OE will provide essential independent assurance to the Intelligent Customer and Intelligent Client for the relevant SMR project. This will support the deployment of first-of-a-kind nuclear technology in the UK and facilitate GBN's goal of reaching a Final Investment Decision(s) for up to two SMR projects. 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. \nThe total contract value of £600m stated in this PME Notice assumes that GBN will award two OE contracts (one for each planned SMR project), each with a total contract value of up to £300m. The actual value will depend on a number of factors. GBN reserves the right not to proceed with two SMR projects.",
"aboveThreshold": true,
"mainProcurementCategory": "services"
},
"parties": [
{
"id": "GB-COH-05027024",
"name": "GREAT BRITISH NUCLEAR",
"roles": [
"buyer"
],
"address": {
"region": "UKI32",
"country": "GB",
"locality": "London",
"postalCode": "SW1A 2EG",
"countryName": "United Kingdom",
"streetAddress": "Department For Energy Security & Net Zero"
},
"details": {
"classifications": [
{
"id": "publicAuthorityCentralGovernment",
"scheme": "UK_CA_TYPE",
"description": "Public authority - central government"
}
]
},
"identifier": {
"id": "05027024",
"scheme": "GB-COH"
},
"contactPoint": {
"email": "commercialcdp@greatbritishnuclear.uk"
},
"additionalIdentifiers": [
{
"id": "PRCJ-2655-YDML",
"scheme": "GB-PPON"
}
]
}
],
"language": "en",
"planning": {
"documents": [
{
"id": "016232-2025",
"url": "https://www.find-tender.service.gov.uk/Notice/016232-2025",
"format": "text/html",
"noticeType": "UK2",
"description": "Preliminary market engagement notice on Find a Tender",
"documentType": "marketEngagementNotice",
"datePublished": "2025-04-22T13:42:16+01:00"
}
],
"milestones": [
{
"id": "engagement",
"type": "engagement",
"status": "met",
"dateMet": "2025-01-24T00:00:00Z",
"description": "GBN has already conducted an early market engagement exercise with suppliers to test GBN's proposed approach against market experience from other large infrastructure projects and use industry knowledge to assist GBN in refining its proposed approach. GBN engaged with suppliers by providing an information pack which outlined GBN's proposed delivery model and gave further context on the role of the OE within this model. The pack stated that from the commencement of the contract, any prospective OE would need to commit to providing the technical and programme capabilities stated in the requirements. \nWithin the information pack provided to suppliers, GBN included a questionnaire for suppliers to complete in order to help GBN refine its proposed approach to the delivery of the OE requirement. Suppliers returned their completed questionnaires electronically to GBN. The questionnaire covered the role of the OE, GBN's contracting strategy, the number of OEs, alliancing, pricing, incentivisation, contract management, costing, liability and the potential to create joint ventures, consortia and special purpose vehicles, market capacity and conflicts of interest."
}
]
},
"initiationType": "tender"
}