My first flight was in a Viscount, BFS-IOM. Years later I worked as a dispatcher and 6 nights a week we had a BAF Viscount deliver 7 tons of The Sun from SEN, then pick up 6 tons of live eels to go to AMS. Working with lots of older aircraft types, often freighters, you always new the Viscount would turn up. Very rarely went tech, unlike the Herald, which Air UK used on passenger schedules and Securicor parcels used on freight. I can remember the screeching darts, particularly when I forgot my ear defenders. I flew in one BFS-SEN on an empty positioning flight on the jump seat and we topped out about 27,000 ft.
Working in BFS in the 80s was a bit like a living museum - Vanguards, Argosy, DC3, Heron, Caravelle, Coronado, CL-44, Belfast, 707, Bristol Freighter...