Aviation Training International Limited (ATIL) - a joint venture Company of Westland Helicopters Limited and The Boeing Company - was selected in 1998 to provide Training Services to support the British Army's Apache AH Mk1  Attack Helicopter. The contract with the UK Ministry of Defence has been let under the Private Finance Initiative ( PFI ) and is for a period of up to thirty years.

ATIL provides training for Army Aircrew, Groundcrew and Maintenance personnel in supporting the introduction and operation of the Apache AH Mk1, one of the British Army's most sophisticated and capable weapons systems.

ATIL has its headquarters in Sherborne, Dorset, and conducts training at four purpose built Training Centres, employing state-of-the-art flight simulators, part task trainers and computer-based teaching and training technologies.