Trident Missile System Mr. Newens asked the Secretary of State for Defence if existing dockyard facilities would be adequate for the use of the submarines for the D5 Trident missile system in the event of a decision being made to purchase this version of Trident. Mr. Blaker I have nothing to add to the answer my right hon. Friend gave to the hon. Member for Motherwell and Wishaw (Dr. Bray) on 10 November—[Vol. 12, c. 406–7]—and the answer I gave to the hon. Member for Dunfermline (Mr. Douglas) on 10 July.—[Vol. 8, c. 237.]