As a flying Scot I was always disappointed that despite my persistence Loganair didn't hire me when I started out. That said, their history still interests me. It would be nice to source some pictures of Willie Logan's fleet in Muir of Ord at what is now the Black Isle Showground.
It would appear from googling that the Strathallan Aztec pilot was a colourful WW2 character who survived Colditz and survives to this day as BOAC suggests in SA.
Strathallan Aero Services seems to have been a charter outfit owned by Sir William Roberts. Whatever became of him when he sold off the aircraft museum? Does he still survive and did he give up his aviation interest altogether?