Written Question·Ministry of Defence·UIN 94531
Comprehensive Test Ban Treaty
Tabled: 25 November 2025
Answered: 3 December 2025
Question
Bell Ribeiro-Addy
Labour — Clapham and Brixton Hill
To ask the Secretary of State for Defence, if he will publish the review made of the Comprehensive Test Ban Treaty (CTBT) methodology as mentioned has been undertaken last year in the Defence Nuclear Enterprise 2025 annual report.
Answer
Luke PollardThe United Kingdom has no plans to publish its Comprehensive Test Ban Treaty (CTBT) methodology. The methodology revalidated our approach to warhead design and certification which is, and will remain, in compliance with the CTBT. We ratified the CTBT in 1...
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