Hawker Siddeley Harrier the AV-8C configuration; this programme involved the installation of ECM equipment and adding a new inertial navigation system to the aircraft's avionics. Substantial changes were the Lift Improvement Devices, to increase VTOL performance; at the same time several airframe components were restored or replaced to extend the life of the aircraft. Spain's Harriers, designated AV-8S or VA.1 Matador for the single-seater and TAV-8S or VAE.1 for the two-seater, were almost identical to USMC Harriers differing only in the radios fitted. The Royal Navy's Fleet Air Arm (FAA) operated a substantially modified variant of the Harrier, the British Aerospace Sea Harrier.
1956 Hawker Hunter multiple aircraft accident 1956 Hawker Hunter multiple aircraft accident On 8 February 1956 the Royal Air Force lost six Hawker Hunter jet fighters in a multiple aircraft accident. Eight aircraft from RAF West Raynham had been carrying out a 4x4 dogfight exercise at . Upon completion of the exercise the eight Hunters diverted to RAF Marham but due to bad weather six of the aircraft were lost including one fatality. The eight Hunter F1s from the Day Fighter Leader Squadron of the Central Fighter Establishment departed RAF West Raynham, Norfolk, England at 10:50 to carry out the exercise at in the local area.