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CETUS Trials and Evaluation

  • First published: 26 June 2026
  • Last modified: 26 June 2026
  • Version: N/A
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Contents

Summary

OCID:
ocds-h6vhtk-050312
Published by:
Submarine Delivery Agency
Authority ID:
AA84169
Publication date:
26 June 2026
Deadline date:
-
Notice type:
Has documents:
No
Has SPD:
No
Has Carbon Reduction Plan:
N/A

Abstract

Defence and security - necessary to enhance or maintain operational capability, effectiveness, readiness for action, safety or security of the armed forcesThe 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.

Full notice text

Scope

Procurement reference

715850606

Procurement 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.

Contracting authority

Submarine Delivery Agency

Identification register:

  • GB-PPON

Address 1: Abbey Wood

Town/City: Bristol

Postcode: BS34 8JH

Country: United Kingdom

Website: https://www.gov.uk/government/organisations/submarine-delivery-agency

Public Procurement Organisation Number: PBHX-4625-LVPD

NUTS code: UKK12

Email: nicole.hoult101@mod.gov.uk

Organisation type: Public authority - central government

Supplier

M Subs Limited

Identification register:

  • GB-COH

Address 1: 42 Sisna Park Road

Town/City: Plymouth

Postcode: PL6 7FH

Country: United Kingdom

Companies House: 05874602

NUTS code: UKK41

Email: alan.hingston@msubs.com

Type:

  • SME

Procedure

Procedure type

Direct award

Description of how these justifications apply

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.

Direct award justification

Additional repeat extension partial replacement

Is this procurement under a special regime?

Defence and security

Contract

2

Is the total value above threshold?

Above threshold

Date the contract will be signed (estimated)

24 June 2026, 00:00AM

Contract dates (estimated)

24 June 2026, 00:00AM to 01 May 2028, 23:59PM

Key performance indicators

Deliverables delivered as per plan

ID: 1

Description

Measure the extent to which milestones are completed, in full, in accordance with the approved project schedule including; trial outputs completed on time, meet the required specifications, and sufficient evidence is provided to the authority for approval.

Reporting frequency: 12

Maintain MS Project plan or equivalent of trials schedule

ID: 2

Description

This KPI measures the accuracy and completeness of the project schedule by ensuring changes are limited. Changes to the project schedule should not exceed 1 change request. This excludes the addition of TAF tasking.

Noting change requests should be submitted for activities not added to the schedule at the start of the contract. The baseline should be persevered, and any late milestones should be appropriately tracked.

Reporting frequency: 12

Social Value 1b Fair working conditions

ID: 3

Description

Activities that demonstrate and describe the Supplier’s existing or planned activities for the contract workforce:

● Monitoring of employee engagement rates (by protected characteristic) and, where necessary, the development of actions to ensure all voices are heard across the diversity of the workforce

● Employment contracts that reflect actual hours worked; steps taken to ensure employees understand their contracts and have the ability to review and adjust them if actual hours regularly exceed contracted hours

● Activities that support an environment where staff are educated about and feel empowered to report and address bullying and harassment

● Activities to cascade good practice on fair working conditions throughout the supply chain

● Number of people working on the contract (aged 16 and above) who have a permanent contract.

Reporting frequency: 12

Lots

Divided into 1 lots

Lot number: 1 Status: Complete

Documents

ID

conflictOfInterest

Document type

Conflict of interest

Description

Not published

Coding

Commodity categories

ID Title Parent category
73410000 Military research and technology Research and Development services on security and defence materials

Delivery locations

ID Description
100 UK - All

Alert region restrictions

The buyer has restricted the alert for this notice to suppliers based in the following regions.

ID Description
There are no alert restrictions for this notice.

About the buyer

Main contact:
N/a
Admin contact:
N/a
Technical contact:
N/a
Other contact:
N/a

Further information

Date Details
No further information has been uploaded.

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