After joining forces with the Stagecoach Group, and receiving huge investment, he kept them running and made them rebrand to ScotAirways instead. I beleive his name is Brian, and he was a regular passenger on the LCY-EDI and Dundee route.
Just to make clear Stagecoach PLC do not have an investment in Scot Airways it is Brian Souter (as you said) and Ann Gloag who founded Stagecoach holding the investment in a personal capacity, similar to their stake in bus manufacturer Alexander Dennis