Question to the Ministry of Defence:

To ask the Secretary of State for Defence, with reference to the Answer of 26 September 2014 to Question 209770 asked by the hon. Member for Moray, how much his Department has spent on studies on whether to refurbish or replace the existing Trident warhead design to date.

As of the end of the last financial year (March 2015), the Ministry of Defence had spent £80 million on technology studies to support refurbishment of the current system and explore options for a potential future warhead, and £5.5 million on studies to support the decision whether to refurbish or replace the existing warhead.