To ask the Secretary of State for Defence for how many days the Sea Dart missile system was fully operational for each of the eight remaining Type 42 destroyers in (a) the last 12 months and (b) 2006. (141002)

The Sea Dart missile system has a good record for reliability and effectiveness. I am withholding the detailed information as its release would, or would be likely to, prejudice the capability, effectiveness and security of our armed forces.