CETUS Trials and Evaluation: United Kingdom contract and delivery record — 24 Jun 2026

Development and reported outcome

The CETUS Trials and Evaluation contract with M Subs Ltd was signed on June 24, 2026 at GBP 6.68014721 million excluding VAT for trials using the existing XV Excalibur demonstrator. A UK11 termination notice published on July 8 later reported a GBP 3.80402403 million excluding-VAT final value, while also containing an internally inconsistent end-date field that predates contract signing. The signed-contract milestone remains valid, but the original May 2028 performance schedule should not be treated as continuing after termination.[S1] [S2] [S3]

Program, platform and stakeholders

Programme or contract: CETUS Trials and Evaluation. Platform or product: CETUS / XV Excalibur XLUUV. Platform classification: Autonomous Operated Vehicle. Recorded supplier, developer or relevant organization: M Subs Ltd (reported headquarters/country: United Kingdom). Recorded customer, operator or intended user: Submarine Delivery Agency / Royal Navy (reported headquarters/country: United Kingdom).[S1] [S2] [S3]

Mission and technical scope

The following are classifications recorded in the source master, not additional claims of operational deployment: Mission/use-case classification: Technology Demonstration / Testbed; Seabed Warfare; Underwater ISR / Surveillance.

Contract, value and shipment signals

Original reported amount or scope: GBP 6,680,147.21 excl. VAT signed value; UK11 termination notice reports GBP 3,804,024.03 excl. VAT final value. Original-currency label: GBP. Recorded quantity, delivery, demonstration or volume signal: 1 existing demonstrator used for T&E. Delivery schedule, procurement window or milestone status: Originally planned through 1-May-2028; contract subsequently terminated. Recorded contractual start: 24-Jun-26. Recorded contractual end: Contract terminated; UK11 termination metadata contains an inconsistent end date earlier than signing. Recorded contractual duration: Signed 24-Jun-2026; later terminated; reliable effective termination date not established from published metadata.[S1] [S2] [S3]

Source verification and interpretation limits

UXV Searcher master source-coverage note: Find a Tender UK7 notice 059923-2026 confirms contract signing on 24-Jun-2026 at GBP 6,680,147.21 excl. VAT. UK11 notice 063930-2026 confirms termination and reports GBP 3,804,024.03 excl. VAT final value, but its implementation end-date metadata is chronologically inconsistent with the signed date; therefore no precise effective termination date is inferred.

Interpretation boundary: The source-specific record should be used to distinguish award, arrival, commissioning and completed delivery; these stages are not interchangeable.[S1] [S2] [S3]

UXV Searcher analysis — what the development changes

UXV Searcher interpretation — contract / recorded award outcome: The United Kingdom UUV record for CETUS Trials and Evaluation is best treated as a committed commercial activity signal. The recorded award or contract is a stronger transaction signal than a tender; the amount and quantity still need separation into platforms, accessories, support and services.

Traceability for buyers: The dataset associates M Subs Ltd with Submarine Delivery Agency / Royal Navy for CETUS / XV Excalibur XLUUV. This supports stakeholder mapping; supply-chain tier, exclusivity and signed-customer relationships need the underlying source before firm classification.

Client-use interpretation: For intelligence users tracking Technology Demonstration / Testbed; Seabed Warfare; Underwater ISR / Surveillance, the relevant next proof points are underwater mission readiness, subsea navigation and operator acceptance. Watch for acceptance or delivery reports, contract modifications and whether the stated amount covers equipment or ancillary work.[S1] [S2] [S3]

Quantitative evidence, calculations and limits

Financial signal (master transcription): GBP 6,680,147.21 excl. VAT signed value; UK11 termination notice reports GBP 3,804,024.03 excl. VAT final value. Classification: Financial context as recorded in the master; scope and contract status must follow the underlying source. Quantity/scope signal: 1 existing demonstrator used for T&E. Counting rule: Scope or component count; not a count of procured or delivered unmanned platforms. Delivery/timing evidence: Originally planned through 1-May-2028; contract subsequently terminated. Scheduling language is not independently proof of completion or acceptance.

Any volume or value must stay tagged to its awarded work package; mixed services, components and platform counts cannot be consolidated as vehicle deliveries.[S1] [S2] [S3]