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Written question asked by Ben Obese-Jecty (Conservative) on Friday, 28 August 2026, in the House of Commons. It was due for an answer on Wednesday, 2 September 2026. It was answered by Luke Pollard (Labour) on Tuesday, 8 September 2026 on behalf of the Ministry of Defence.

Astute Class Submarines

Question

To ask the Secretary of State for Defence, with reference to the National Infrastructure and Service Transformation Authority Major Projects Annual Report 2025 to 2026, Tables, Astute Boats 1-7, whether delays have impacted the in-water phase for Boat 6.

Answer

In September 2025, the sixth Astute Class submarine, HMS AGAMEMNON was commissioned into the Royal Navy and is undertaking the final stages of her in-water commissioning, before a handover to the Royal Navy to undertake sea trials.

Achilles, the seventh and last boat of the class, remains at an advanced stage of build in Barrow-in-Furness and work to recover from the impact of the fire in the Devonshire Dock Hall is progressing well.

The planned in-service dates for Royal Navy submarines are withheld as disclosure would, or would be likely to, prejudice the capability, effectiveness, or security of the Armed Forces.

Secondary information

Type
Written question
Reference
23307
Session
2026-27
Grouped for answer
Yes
Subjects
Nuclear submarines Astute class submarines
Link
View this Written question on www.parliament.uk