This public procurement record has 2 releases in its history.

Award

15 Jun 2026 at 14:25

Award

15 Apr 2025 at 10:32

Summary of the contracting process

The Submarine Delivery Agency, operating out of Bristol, UK, has undertaken a contracting process for the "CETUS Trials and Evaluation" project, focusing on the Defence and Security sector. This procurement involves the direct award of a contract to M-Subs Ltd for conducting trials and evaluations using the CETUS vessel to enhance operational capability and safety of the armed forces. The procurement stage is now complete, with the contract valued at GBP 6.68 million, scheduled to run from 25 June 2026 to 1 May 2028. The contract was directly awarded due to the unique capabilities of M-Subs Ltd, the sole designer and manufacturer of the CETUS vessel, which requires their proprietary knowledge for safe and effective operation.

This tender offers significant business growth opportunities, primarily for firms with expertise in underwater autonomy and military technology. Companies involved in developing advanced military systems, particularly those that can supply or integrate different payloads, could find substantial opportunities in this contract. Although M-Subs Ltd is currently positioned as the main contractor due to its technical expertise and previous experience with the CETUS vessel, there will be future opportunities for other suppliers to compete for longer-term operations and payload provisions. Businesses capable of contributing to this technological advancement stand to benefit from engaging with projects like CETUS.

How relevant is this notice?

Notice Title

CETUS Trials and Evaluation

Notice Description

Defence and security - necessary to enhance or maintain operational capability, effectiveness, readiness for action, safety or security of the armed forces The SDA require Trials and Evaluation (T&E) to be undertaken using the CETUS vessel that is currently being developed by M Subs. T&E is required to de-risk underwater autonomy and demonstrate military utility through payload testing. As the sole designer and manufacturer of CETUS, M Subs hold all technical and proprietary knowledge of the vessel's form and function, and as such are uniquely positioned to safely operate the vessel in the execution of trials. Initial trials are a repeat of S201 trials XLAUV trials previously performed by M Subs on a smaller vessel within Project Manta), which M Subs delivered through the DASA Open call (competitive) contracting. Knowledge of these trials is advantageous in allowing these activities to be repeated consistently and efficiently. While there are alternative commercial operators of AUVs, none currently hold the necessary system knowledge to operate this unique system appropriately. Choosing an alternative supplier risks delay, increased cost, or higher system risks (e.g. of system damage) while this knowledge is gained. This would impede development of this capability, which the Authority has a military imperative to advance. Once the initial trials have been undertaken there will be greater scope for the Authority to compete longer term operation of the system once it is better understood by all parties allowing a meaningful competition to be undertaken. Separate to the operation of CETUS, the Authority intends to competitively seek different payloads from the open market in the coming years, allowing a broad range of suppliers to participate in advancing military capability within this project.

Procurement Information

The SDA require Trials and Evaluation (T&E) to be undertaken using the CETUS vessel that is currently being developed by M Subs. T&E is required to de-risk underwater autonomy and demonstrate military utility through payload testing. As the sole designer and manufacturer of CETUS, M Subs hold all technical and proprietary knowledge of the vessel's form and function, and as such are uniquely positioned to safely operate the vessel in the execution of trials. Initial trials are a repeat of S201 trials XLAUV trials previously performed by M Subs on a smaller vessel within Project Manta), which M Subs delivered through the DASA Open call (competitive) contracting. Knowledge of these trials is advantageous in allowing these activities to be repeated consistently and efficiently. While there are alternative commercial operators of AUVs, none currently hold the necessary system knowledge to operate this unique system appropriately. Choosing an alternative supplier risks delay, increased cost, or higher system risks (e.g. of system damage) while this knowledge is gained. This would impede development of this capability, which the Authority has a military imperative to advance. Once the initial trials have been undertaken there will be greater scope for the Authority to compete longer term operation of the system once it is better understood by all parties allowing a meaningful competition to be undertaken. Separate to the operation of CETUS, the Authority intends to competitively seek different payloads from the open market in the coming years, allowing a broad range of suppliers to participate in advancing military capability within this project.

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-050312
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/056285-2026
Current Stage
Award
All Stages
Award

Procurement Classification

Notice Type
UK6 - Contract Award Notice
Procurement Type
Standard
Procurement Category
Services
Procurement Method
Direct
Procurement Method Details
Direct award
Tender Suitability
SME
Awardee Scale
SME

Common Procurement Vocabulary (CPV)

CPV Divisions

73 - Research and development services and related consultancy services


CPV Codes

73410000 - Military research and technology

Notice Value(s)

Tender Value
Not specified
Lots Value
Not specified
Awards Value
£6,680,147 £1M-£10M
Contracts Value
Not specified

Notice Dates

Publication Date
15 Jun 20261 weeks ago
Submission Deadline
Not specified
Future Notice Date
Not specified
Award Date
15 Apr 20251 years ago
Contract Period
24 Jun 2026 - 1 May 2028 1-2 years
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Complete
Awards Status
Active
Contracts Status
Not Specified

Contracting Authority (Buyer)

Main Buyer
SUBMARINE DELIVERY AGENCY
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
BRISTOL
Postcode
BS34 8JH
Post Town
Bristol
Country
England

Major Region (ITL 1)
TLK South West (England)
Basic Region (ITL 2)
TLK5 West of England
Small Region (ITL 3)
TLK52 Bath & North East Somerset and South Gloucestershire
Delivery Location
Not specified

Local Authority
South Gloucestershire
Electoral Ward
Stoke Park & Cheswick
Westminster Constituency
Filton and Bradley Stoke

Supplier Information

Number of Suppliers
1
Supplier Name

M-SUBS

Open Contracting Data Standard (OCDS)

View full OCDS Record for this contracting process

JSON Markdown

The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

{
    "tag": [
        "compiled"
    ],
    "id": "ocds-h6vhtk-050312-2026-06-15T15:25:40+01:00",
    "date": "2026-06-15T15:25:40+01:00",
    "ocid": "ocds-h6vhtk-050312",
    "initiationType": "tender",
    "parties": [
        {
            "id": "GB-PPON-PBHX-4625-LVPD",
            "name": "Submarine Delivery Agency",
            "identifier": {
                "scheme": "GB-PPON",
                "id": "PBHX-4625-LVPD"
            },
            "address": {
                "streetAddress": "Abbeywood",
                "locality": "bristol",
                "postalCode": "BS34 8JH",
                "country": "GB",
                "countryName": "United Kingdom",
                "region": "UKK12"
            },
            "contactPoint": {
                "email": "Nicole.Hoult101@mod.gov.uk"
            },
            "roles": [
                "buyer"
            ],
            "details": {
                "url": "https://www.gov.uk/government/organisations/submarine-delivery-agency",
                "classifications": [
                    {
                        "id": "publicAuthorityCentralGovernment",
                        "scheme": "UK_CA_TYPE",
                        "description": "Public authority - central government"
                    }
                ]
            }
        },
        {
            "id": "GB-COH-05874602",
            "name": "M-Subs Ltd",
            "identifier": {
                "scheme": "GB-COH",
                "id": "05874602"
            },
            "address": {
                "streetAddress": "42 Sisna Park Road",
                "locality": "Plymouth",
                "postalCode": "PL6 7FH",
                "country": "GB",
                "countryName": "United Kingdom",
                "region": "UKK41"
            },
            "contactPoint": {
                "email": "alan.hingston@msubs.com"
            },
            "roles": [
                "supplier"
            ],
            "details": {
                "url": "https://www.msubs.com/",
                "scale": "sme",
                "vcse": false,
                "publicServiceMissionOrganization": false,
                "shelteredWorkshop": false
            }
        }
    ],
    "buyer": {
        "id": "GB-PPON-PBHX-4625-LVPD",
        "name": "Submarine Delivery Agency"
    },
    "tender": {
        "id": "715850606",
        "legalBasis": {
            "id": "2023/54",
            "scheme": "UKPGA",
            "uri": "https://www.legislation.gov.uk/ukpga/2023/54/contents"
        },
        "title": "CETUS Trials and Evaluation",
        "description": "Defence and security - necessary to enhance or maintain operational capability, effectiveness, readiness for action, safety or security of the armed forces The SDA require Trials and Evaluation (T&E) to be undertaken using the CETUS vessel that is currently being developed by M Subs. T&E is required to de-risk underwater autonomy and demonstrate military utility through payload testing. As the sole designer and manufacturer of CETUS, M Subs hold all technical and proprietary knowledge of the vessel's form and function, and as such are uniquely positioned to safely operate the vessel in the execution of trials. Initial trials are a repeat of S201 trials XLAUV trials previously performed by M Subs on a smaller vessel within Project Manta), which M Subs delivered through the DASA Open call (competitive) contracting. Knowledge of these trials is advantageous in allowing these activities to be repeated consistently and efficiently. While there are alternative commercial operators of AUVs, none currently hold the necessary system knowledge to operate this unique system appropriately. Choosing an alternative supplier risks delay, increased cost, or higher system risks (e.g. of system damage) while this knowledge is gained. This would impede development of this capability, which the Authority has a military imperative to advance. Once the initial trials have been undertaken there will be greater scope for the Authority to compete longer term operation of the system once it is better understood by all parties allowing a meaningful competition to be undertaken. Separate to the operation of CETUS, the Authority intends to competitively seek different payloads from the open market in the coming years, allowing a broad range of suppliers to participate in advancing military capability within this project.",
        "status": "complete",
        "procurementMethod": "direct",
        "procurementMethodDetails": "Direct award",
        "procurementMethodRationale": "The SDA require Trials and Evaluation (T&E) to be undertaken using the CETUS vessel that is currently being developed by M Subs. T&E is required to de-risk underwater autonomy and demonstrate military utility through payload testing. As the sole designer and manufacturer of CETUS, M Subs hold all technical and proprietary knowledge of the vessel's form and function, and as such are uniquely positioned to safely operate the vessel in the execution of trials. Initial trials are a repeat of S201 trials XLAUV trials previously performed by M Subs on a smaller vessel within Project Manta), which M Subs delivered through the DASA Open call (competitive) contracting. Knowledge of these trials is advantageous in allowing these activities to be repeated consistently and efficiently. While there are alternative commercial operators of AUVs, none currently hold the necessary system knowledge to operate this unique system appropriately. Choosing an alternative supplier risks delay, increased cost, or higher system risks (e.g. of system damage) while this knowledge is gained. This would impede development of this capability, which the Authority has a military imperative to advance. Once the initial trials have been undertaken there will be greater scope for the Authority to compete longer term operation of the system once it is better understood by all parties allowing a meaningful competition to be undertaken. Separate to the operation of CETUS, the Authority intends to competitively seek different payloads from the open market in the coming years, allowing a broad range of suppliers to participate in advancing military capability within this project.",
        "specialRegime": [
            "defenceSecurity"
        ],
        "lots": [
            {
                "id": "1",
                "status": "complete",
                "suitability": {
                    "sme": true
                }
            }
        ],
        "documents": [
            {
                "id": "conflictOfInterest",
                "documentType": "conflictOfInterest",
                "description": "Not published"
            }
        ],
        "procurementMethodRationaleClassifications": [
            {
                "id": "defenceSecurityOperational"
            }
        ]
    },
    "awards": [
        {
            "id": "1",
            "status": "active",
            "value": {
                "amountGross": 8016176.65,
                "amount": 6680147.21,
                "currency": "GBP"
            },
            "mainProcurementCategory": "services",
            "aboveThreshold": true,
            "suppliers": [
                {
                    "id": "GB-COH-05874602",
                    "name": "M-Subs Ltd"
                }
            ],
            "items": [
                {
                    "id": "1",
                    "additionalClassifications": [
                        {
                            "scheme": "CPV",
                            "id": "73410000",
                            "description": "Military research and technology"
                        }
                    ],
                    "relatedLot": "1",
                    "deliveryAddresses": [
                        {
                            "region": "UK",
                            "country": "GB",
                            "countryName": "United Kingdom"
                        }
                    ]
                }
            ],
            "contractPeriod": {
                "startDate": "2026-06-25T00:00:00+01:00",
                "endDate": "2028-05-01T23:59:59+01:00",
                "maxExtentDate": "2028-05-31T23:59:59+01:00"
            },
            "hasRenewal": true,
            "renewal": {
                "description": "It is intended that this contract will be directly awarded in accordance with section 41 and Schedule 5 paragraph 6 of the Procurement Act 2023 to M Subs Ltd. The contract is intended to be let for one year with the option for extension of up to two years, allowing the Authority sufficient time to understand the system and its use."
            },
            "hasOptions": true,
            "options": {
                "description": "It is intended that this contract will be directly awarded in accordance with section 41 and Schedule 5 paragraph 6 of the Procurement Act 2023 to M Subs Ltd. The contract is intended to be let for one year with the option for extension of up to two years, allowing the Authority sufficient time to understand the system and its use."
            },
            "relatedLots": [
                "1"
            ],
            "documents": [
                {
                    "id": "015189-2025",
                    "documentType": "awardNotice",
                    "noticeType": "UK5",
                    "description": "Transparency notice on Find a Tender",
                    "url": "https://www.find-tender.service.gov.uk/Notice/015189-2025",
                    "datePublished": "2025-04-15T11:32:57+01:00",
                    "format": "text/html"
                },
                {
                    "id": "056285-2026",
                    "documentType": "awardNotice",
                    "noticeType": "UK6",
                    "description": "Contract award notice on Find a Tender",
                    "url": "https://www.find-tender.service.gov.uk/Notice/056285-2026",
                    "datePublished": "2026-06-15T15:25:40+01:00",
                    "format": "text/html"
                }
            ],
            "milestones": [
                {
                    "id": "1",
                    "type": "futureSignatureDate",
                    "dueDate": "2026-06-25T23:59:59+01:00",
                    "status": "scheduled"
                }
            ],
            "title": "CETUS Trials and Evaluation",
            "date": "2026-06-15T00:00:00+01:00",
            "subcontracting": {
                "subcontracts": [
                    {
                        "id": "1",
                        "mainContractors": [
                            {
                                "id": "GB-COH-05874602",
                                "name": "M-Subs Ltd"
                            }
                        ],
                        "description": "Not applicable"
                    }
                ]
            }
        }
    ],
    "language": "en"
}