Wycombe,
BMI regional use ''Midland'' now.I think ''Granite'' was Business Air until it became,merged,evolved into BMI regional.They used to be Air Ecosse in the 70's.Callsign Ecosse.
Mooncrest.
Then there was Aberdeen Airways with ''Bon Accord''.
Good old Dan Air. (Dan dare,Dan scare).The alpha numerics were a later addition.Brymon and Alidair as well but they just used straightforward callsigns.
Ah that was when the job was fun.