HC Deb 23 February 1939 vol 344 c603W
Lieut.-Commander Fletcher

asked the Secretary of State for Air for what length of time during the last 12 months has the Lorenz system at Heston Airport been unavailable for the use of pilots in conditions of bad visibility?

Captain Balfour

Owing to interference from some outside source the elimination of which has involved the re-siting of the beacon and to the necessity of enlarging the landing area before the beacon can be safely used in conditions of bad visibility, the Lorenz system at Heston has not been available during the past 12 months for use by pilots in such conditions. It has, however, been available since November, 1938, for practice purposes in good visibility, and it is hoped that it will be available for use in all weathers in the near future.