For those of you that want to know; here is a pairing of ground handlers and airlines at Gatwick. This small list is based on information given in the June 2014 performance report here:
Our performance - Gatwick Airport
Swissport:
Air China, Air Vietnam, Arkefly, British Airways, Caribbean Airlines, flynas, Icelandair, Monarch, Strategic Airlines, TAP Portugal, Thomas Cook, Thomson Airways, Veuling, Virgin Atlantic
Menzies:
Aer Lingus, Air Malta, Aurigny, easyJet, Flybe, Titan Airways, Turkish Airlines
Aviator:
African Safari Airways, airBaltic, Air Europa, Air Transat, Emirates, Meridiana, Norwegian Air Shuttle, Ryanair, Ukraine International Airlines, WOWair