The
Hawker Siddeley P.1154 was a planned
supersonic vertical/short take-off and landing (V/STOL) fighter aircraft designed by
Hawker Siddeley Aviation (HSA). Developed alongside the subsonic and smaller
Hawker Siddeley P.1127/Kestrel, the P.1154 was derived from the P.1150. The P.1150 proposal did not meet NATO Basic Military Requirement 3 and, consequently, the P.1154 was born. This
Mach 2-capable platform retained
plenum chamber burning previously designed for the P.1150. Although the technical winner out of eleven submissions, follow-on testing and production for the P.1154 did not proceed as a result of political strife.