Written Question·Ministry of Defence·UIN 70223

Nuclear Weapons: Decommissioning

Tabled: 22 July 2025
Answered: 1 September 2025

Question

Martin Wrigley

Liberal DemocratNewton 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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