Question to the Ministry of Defence:

To ask the Secretary of State for Defence, what the expected out-turn expenditure is on (a) Project Pegasus and (b) Project Mensa at the Atomic Weapons Establishment.

Project Pegasus received Main Gate approval in August 2011 with an approved cost of £634 million. Project Mensa received Main Gate approval in May 2011 with an approved cost of £734 million.Both projects' approved in-service dates are between 2016 and 2020.

Consistent with industry best practice, major projects are regularly reviewed and may seek revised approvals if a robust evidence base is established.