BHX from the best of my knowledge
Penauille Servisair
Aer Lingus, Air Berlin, Air India, Air Malta, Balkan, City Airline, Continental Airlines, Emirates, European, Excel, Neos, PIA, Thomsonfly
aviance
Air France, Astraeus, Austrian Arrows, bmibaby, bmi charter, BritishJet, Eurowings, KLM, KLM Cityhopper, Lufthansa, Ryanair, SAS, Thomas Cook, Uzbekistan Airlines
Swissport UK/Groundstar
Aerosvit, Air Slovakia, Cyprus Airways, Eurocypria, First Choice, flybe, LTE, Mahan Air, Monarch Airlines, Monarch Scheduled, MyTravel, Swiss, Turkmenistan Airlines. (Swissport are likely to get the contracts currently handled by BA - SN Brussels Airlines and Eastern Airways, alongside the BACON flights after the flybe merger.)
Aviation Support
HLX, SkyEurope