Written question asked by Ben Obese-Jecty (Conservative) on Thursday, 2 July 2026, in the House of Commons. It was due for an answer on Monday, 6 July 2026. It was answered by Luke Pollard (Labour) on Friday, 10 July 2026 on behalf of the Ministry of Defence.

Trident Submarines

Question: To ask the Secretary of State for Defence, what plans he has to define the requirement for the post-Dreadnought strategic deterrent.

Answer: As announced in the Defence Investment Plan, this Government will invest over £20 billion more in the Defence Nuclear Enterprise over the next four years than the previous four years to modernise and sustain our nuclear deterrent, the cornerstone of our national security. This will fund our new deterrent submarines and warheads, establish a nuclear fuels programme, start defining the Dreadnought successor, and upgrade our infrastructure across the defence nuclear estate. This will allow us to meet the Government’s commitment to start to define the requirement for the post-Dreadnought strategic deterrent within this Parliament.

Secondary information

Type: Written question
Reference: 15525
Session: 2026-27
Related items: Nuclear Weapons
Friday, 17 July 2026
Written questions
House of Commons; Trident Submarines
Friday, 17 July 2026
Written questions
House of Commons; Nuclear Submarines
Monday, 7 September 2026
Written questions
House of Commons
Subjects: Trident submarines
Link: View this Written question on www.parliament.uk