To ask Her Majesty’s Government what is the in-service date for the UK Trident Mark 4A nuclear warhead; what are the estimated costs of the Mark 4A programme; and what progress has been made to date in delivering that programme.
Answered on
27 July 2016
I am withholding details of the date of the Mk 4A's component's entry into service, progress to date and the cost of the programme, for the purpose of safeguarding national security.
Answered by
Ministry of Defence