To ask the Secretary of State for Defence what expenditure has been incurred since 14 March 2007 on (a) the Trident D5 missile life extension programme and (b) the initial review of the need to replace the Vanguard-class ballistic-missile submarine platform for Trident D5 nuclear weapons systems. (150265)

[holding answer 18 July 2007]: No expenditure has been incurred since 14 March 2007 on the Trident D5 missile life extension programme. The programme to replace the Vanguard-class ballistic-missile submarine platform incurred expenditure of around £900,000 from 1 April to 30 June 2007, the most recent quarter for which information is available.