I've done 500ft across Scapa Flow in a BEA Viscount; didn't know BOAC had ever operated them!
BOAC had two 700 series Viscounts based at Prestwick in the early to mid 70s. They operated a feeder service from Aberdeen and, I believe, Edinburgh or Belfast to connect to the transatlantic flights which BOAC then operated. They were painted in full BOAC colours and used the Speedbird callsign (not Beeline). They were repainted in British Airways colours shortly before retirement.