 International Aviation Services Ltd was an air transport consultancy formed in 1966.It commenced worldwide cargo charters from London Gatwick in 1967 with leased, second-hand Bristol Britannia 300F turboprop equipment.It began replacing leased equipment with its own aircraft in 1971, acquired its own air operator's certificate in June 1972 in the name of International Aviation Services (UK) Ltd and adopted the IAS Cargo Airlines trading name four years later.