Dont remember anyone named Collins? Was he a Pilot/Engineer any further clues? (Bernard Collins was Luton airport director at about that time?)
Mary Robb was on the 1-11 that hit the Aztec. The surviving Aztec pilot was George Adams from Luton flying club and I think the 1-11 Captain was Pete
(?) name now escapes me -but he had a little goatie ginger beard and was nicknamed Rufus!! Went on to fly with Britannia.