HC Deb 20 January 1997 vol 288 c451W
Mr. Gordon Prentice

To ask the Secretary of State for Defence how many departures from the agreed flight plan of naval helicopters on training flights occurred in each year since 1992. [11527]

Mr. Soames

This information is not available. Military aircraft are not required to file flight plans other than if transmitting through civil controlled airspace. Departures from a sortie plan can occur for a variety of emergency, operational or air traffic control reasons.