Repair and maintenance services of aircraft engines. Requirement for an enabling contract to provide, separately, both a supply of aircraft engine spares and a spares inclusive repair and overhaul service to the BBMF for Rolls Royce Merlin & Griffon engines. The repair and overhaul element of the contract will be spares inclusive and includes the bay maintenance of associated engine components, with an estimated feed-in rate of two aircraft annually. The supply of spares will be in addition to those required for the repair and overhaul and will be supplied on an as required basis.