Son of William Stuart Thompson Ainslie and Constance Pauline, nee Lewis. Ed, Dale College, Kingwilliamstown. Born King William's Town. Ex-Cadet of the South African Training Ship General Botha. Cadet Draft 1929-30 (Senior Cadet Captian). After leaving General Botha Allan Stuart Ainslie became a cadet in the White Star Line and also a Probationary Midshipman RNR. In 1938 he joined the RAF in which he became Flight-Lieutenant and was awarded the DFC for gallantry in action during operations off the Island of Silt. Flight Lieutenant 6 February 1940.
LG Sup 20 February 1940 pg. 1055