Written Question·Ministry of Defence·UIN 70223

Nuclear Weapons: Decommissioning

Tabled: 22 July 2025
Answered: 1 September 2025

Question

Martin Wrigley

Liberal Democrat — Newton Abbot

To ask the Secretary of State for Defence, how much plutonium has been recovered as part of the Mk4A Trident warhead dismantlement programme; what proportion has been re-used in current warhead systems; where remaining material is stored; and what the tot

Answer

Maria Eagle
The Mk4 warhead components are being disassembled and re-used, recycled or safely disposed of at the Atomic Weapons Establishment (AWE) Burghfield site, following the transition to the Mk4A warhead in 2023. The cost of disassembling our nuclear warheads a...
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