Hawker Siddeley much larger firms. Out of this decision, came the "order" that all future contracts being offered had to include agreements to merge companies. In 1959, Folland Aircraft was acquired, followed by de Havilland Aircraft Company and Blackburn Aircraft in 1960. In 1963, the names of the constituent companies were dropped, with products being rebranded as ""Hawker Siddeley"" or ""HS"". In this period, the company developed the first operational, and, by far, the most successful VTOL jet aircraft, the Harrier family. This aircraft remained in production into the 1990s and remains in service. In 1948, Hawker Siddeley acquired a factory in
1956 Hawker Hunter multiple aircraft accident the pilots were all competent, the aircraft were serviceable and had adequate fuel and endurance for the planned mission. The Air Officer Commanding-in-Chief Fighter Command decided that disciplinary action should be taken against officers in charge of flying operations at West Raynham. One officer was reproved and removed from his job and three other officers were reproved. 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