The Hawker Siddeley P.1154 might have been the world's first production supersonic V/STOL fighter before the F-35, but the project was cancelled in February 1965.
What were the main reasons behind the failure of the project, and how plausible might these be avoided? Would the Harrier jet be butterflied away?
The P.1154 might have been exported to air-forces around the world. Other than the United Kingdom, who else might have an interest in the aircraft?
In my opinion, the P.1154 might have had a real mark on the Falkland war, assuming it occurs as OTL.