To ask the Secretary of State for Defence how many (a) officers and (b) other ranks are employed at HM Naval Base Clyde as crews on Vanguard class submarines. (260952)

As at 1 March 2009, 114 officers and 883 ratings were assigned to Vanguard class submarines. Data are not held in the format that allows identification of the numbers employed at HMNB Clyde. HMS Vigilant ships company will be based at HMNB Devonport for a three-year period while she is undergoing a major refit.