asked the Secretary of State for Defence how many aircraft in the RAF are over 20 years old; and what are their type.

416 of the RAF's effective aircraft strength were at least 20 years old at the end of 1978. However, half of these aircraft have been converted during their in-service life from earlier models. Ten types are involved, and these are Canberra, Chipmunk, Devon, Hunter, Meteor, Pembroke, Shackleton, Victor, Vulcan and Whirlwind aircraft.