Corporate flight departments, UK

[Mooncrest]

Volkswagen have a few Falcons (900s, I think). Vernon's Pools used a Beech King Air, G-VRES, as Vernair in the 70s and 80s.
Beecham used to fly their own HS125, on their own AOC.

Granada Television also flew their own HS125 for some years - G-WBPR.