asked the First Lord of the Admiralty why, as land air-fields are not always available, an efficient moveable base for aircraft has not yet been finally tested out and approved by the Admiralty?

I an not clear what it is my hon. Friend has in mind. Development of the most efficient moveable base, namely the aircraft carrier, is constantly under review. Transportable runways for land use are the responsibility of my right hon. Friend the Secretary of State for Air.