I'll change that choice as it is the greatest never built, not 'ever built', sorry again.
Actually its very closely linked, it is the Hawker P1154, This was a twin jet Naval fighter and land based attack aircraft whos performance was going
to be in the F-4 class, but it was basically a BIG Harrier! It was to use PCB afterburning in the front nozzles (placed to avoid incinerating itself)
and was an awesome prospect. In case you're wondering, it was scrapped in the same round of defence cuts that killed the TSR 2 in 1965 and the RAF
and RN both got the aforementioned F-4 Phantom in its place, but only after we ruined it with Spey engines replacing the J-79's!
PS, claim to fame time. I was born on the very day the TSR 2 was cancelled! OK, I know its not really a claim to fame but I thought it was quite a
coincidence with me being aeroplane mad as well!