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CETUS Trials and Evaluation

Submarine Delivery Agency Published 8 Jul 2026 Find a Tender

key details

Statuscomplete
Proceduredirect
SME suitableYes
OCIDocds-h6vhtk-050312

Awards (2)

This procurement was awarded to 2 suppliers. Values shown are per-award; the notice total is ·.

SupplierValueDateStatus
M Subs Limited · · active
M-Subs Ltd £6,680,147 14 Jun 2026 active

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.

notice history

4 notices published against this procurement.

PublishedTypeRegimeNotice
15 Apr 2025 Transparency notice (UK5) Procurement Act 2023 015189-2025
15 Jun 2026 Contract award (UK6) Procurement Act 2023 056285-2026
25 Jun 2026 Contract details (UK7) Procurement Act 2023 059923-2026
8 Jul 2026 Contract termination (UK11) Procurement Act 2023 063930-2026

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