@ LGW
Sorry But I only know about Servisair at Gatwick but the others are just from observations.
Servisair:
Thomson Fly
Thomas Cook
Easyjet
Sterling
Flybe
Ryanair
MyTravel
Etihad
AA
XL
TAP
Delta
Braathens
Qatar
Continental (ramp)
TAP
Onur Air
Emirates
Azerbaijan
Meridiana
Aurigny
ASA
Atlas Blue
Polkovo
Groundstar:
Monarch
Jet2
Virgin
First Choice
Air Malta
Zoom
Air Transat
Flyjet (i think)
Northwest
Croatia
German Wings
Aviance:
Astraeus (i think)
GB Airways (ramp)
Olympic
US Airways
It's not the antire list of airlines by any means but it's all I can think of.