SH6 - Shorts 360
BAC 146 - Bae 146!
PAY - Cheyanne 11
BE99 - Beech 99
VGF - Vanguard/Merchantman
LOF - Electra
SH3 - Shorts SD3-30
LOG - Loganair
NFD - TNT - German registered 146
UPA - Air Foyle (TNT)
CAX - see below
EXT - Executive (still going today but into Coventry)
ABR - Air Bridge Carries/Hunting Cargo
BCS - EuroTrans (DHL)
CAX was a Swiss operator with the Cheyanne 11, possibly HBLNL.