Question to the Ministry of Defence:

To ask the Secretary of State for Defence, what recent estimate he has made of the (a) whole-life programme cost of the Trident successor programme, (b) capital costs associated with (i) submarine acquisition, (ii) Trident missile renewal and (iii) basing facilities, (c) operating costs of the (A) successor fleet and (B) associated capability to protect and sustain that fleet, (d) future costs associated with the Atomic Weapons Establishment maintaining an on-going nuclear warhead design capability and (e) decommissioning costs for that programme; whether these estimates account for recent increases in inflation; and if he will make a statement.

The Ministry of Defence co-ordinates a range of interdependent programmes to support, maintain and renew the United Kingdom's independent nuclear deterrent as well as the decommissioning and disposal activities for defence nuclear capabilities when they leave service. The cost of these programmes and activity is spread across many budgetary areas of the Department and has not previously been reported separately. From financial year 2023-24 we will report the majority of nuclear spend as a separate line in the Department's Supply Estimates.