I was on duty in the Tower, the night the Chipmunk landed on the Grass to the North of 28R. We never saw it and it was not until the North side Met Office rang the tower about 0615 and asked what the light plane was doing on the grass outside their office, that we became aware of the Chippie. There was no sign of the pilot and Passenger who had scarpered under the cover of Darkness. KCW was the watch manager, oh happy days.
Doug B