§ Mr. Tebbitasked the Secretary of State for Defence if there are any known defects in the Linesman-Mediator military/civil radar and air traffic control systems whereby the air defence authorities are denied knowledge of the flight plan and the actual progress reports of civil air traffic movements known to the civil authorities.
§ Mr. JohnNo, but the joint investigation into the collision between an RAF Lightning aircraft and a civil Piper Aztec on 7th January 1976 will include an examination of this aspect.