London Heathrow (LHR)
Parts of my list is more than likely quite out of date so anyone feel free to correct me/make additions.
Air Canada
Air Canada
Air China
Air Mauritius
EVA Air
MEA
Royal Jordanian
Alitalia
Air Malta
Alitalia
Azerbaijan Airlines
Bulgaria Air
JAT Airways
Malaysia Airlines
Olympic Air
Uzbekistan Airways
American Airlines
American Airlines
Kuwait Airways
ANA
ANA (Ramp by American Airlines)
Aviance
Biman Bangladesh
EL AL Israel Airlines
Ethiopian Airlines (Ramp by Plane Handling)
Iberia
Japan Airlines
Jet Airways
Qantas
Royal Brunei Airlines
Singapore Airlines
Turkmenistan Airlines
US Airways
Vueling Airlines
bmi
Aegean Airlines
Asiana Airlines
bmi
Transaero Airlines
(All Ramp Handled by Aviance)
British Airways
British Airways
Cathay Pacific
Cathay Pacific (Ramp by Plane Handling)
Cobalt Ground Services
Aeroflot Russian Airlines
Air Astana
Air France
Air Seychelles
Air Transat
Continental Airlines
CSA Czech Airlines
Delta Air Lines
Kenya Airways
Kingfisher Airlines
KLM
Libyan Airlines
Rossiya Airlines
SriLankan Airlines
Syrian
TAM Airlines?
Tunisair
Yemenia?
Gulf Air
Gulf Air (Ramp by Alitalia)
Menzies Aviation
Aer Lingus
Air New Zealand
Austrian
Croatia Airlines
Cyprus Airways
Finnair
Icelandair
LOT Polish Airlines
Lufthansa
SWISS
TAP Portugal
SAS
Blue1
Emirates (Ramp by Plane Handling)
SAS
Thai Airways
Turkish Airlines
Saudi Arabian Airlines
Saudi Arabian Airlines (Ramp by Plane Handling)
Servisair
Air Algerie
Air India
Arik Air
Egyptair
Iran Air
Pakistan International Airlines
Qatar Airways
Royal Air Maroc
Unknown
China Eastern Airlines
Oman Air
Virgin Atlantic
Virgin Atlantic (Ramp by Plane Handling)