Angus Johnston was born on 6th June 1921. He was the son of Mr and Mrs Peter Mossey Johnston of Souris, Prince Edward Island. Little is known of his life prior to enlisting or his training as an air gunner. He joined Thomas Kneale's crew as rear gunner at 23 Operational Training Unit (23 O.T.U.) in March 1943 and flew with Kneale pretty much constantly until their deaths in the Yearsley accident. There is some confusion as to whether he was the rear gunner when the aircraft crashed at Yearsley though. He and Sgt Fortier may have switched positions in October 1943 with Gus Johnston becoming the mid upper gunner in the Lancaster.

At the time of his death following the accident at Yearsley he was on his sixteenth operational flight. He was twenty two years old and buried with other members of his crew at Harrogate Stonefall Cemetery, Yorkshire. He received his commission to Pilot Officer after his death from Warrant Officer (R/104061).

A further photograph of F/Sgt Johnston (as he was at the time, Sgt Fortier and P/O Prill.