Sydney Camm went into service, serving with the Royal Navy from 1947 to 1955. After the Second World War, Camm created many jet-powered designs which would become important aircraft in the Cold War era. Notable among Camm's post-war work is his contribution to the design of the Hawker Siddeley P.1127 / Kestrel FGA.1, the progenitor of the Hawker Siddeley Harrier. The Harrier is a well-known vertical takeoff and landing (VTOL) aircraft designed at Hawker Siddeley, which would later merge into British Aerospace, now known as BAE Systems. The Harrier was one of the radical aircraft which took shape in postwar Britain, which
Hawker Siddeley Harrier the P.1154 was cancelled, as the Royal Navy had already begun procurement of the McDonnell Douglas Phantom II and the RAF placed a greater importance on the BAC TSR-2's ongoing development. Work continued on elements of the project, such as a supersonic PCB-equipped Pegasus engine, with the intention of developing a future Harrier variant for the decades following cancellation. Following the collapse of the P.1154's development the RAF began considering a simple upgrade of the existing subsonic Kestrel and issued Requirement ASR 384 for a V/STOL ground attack jet. Hawker Siddeley received an order for six pre-production aircraft in 1965,