Hurricane 2, I was told by a chum who worked on it.
But the bell mouth intake didn't really meet the intake mass flow requirements and it only had a single engine. Not a very good one either, if the RN's Buccaneer S1 experience was anything to go by!
I would agree that P1154 would have needed a HUGE amount of development work; however, there was a less ambitious 'fast Harrier' (whose designation I forget) which might have worked.
Wislon and the other closet communists in power at the time didn't like the idea that TSR-2 could take a nuclear weapon to Mother Russia, so it had no chance whatsoever after Mountbottom stabbed it in the back - if 'Tinkerbelle'
didn't support it, why should the fellow travellers in Westminster?
Barstewards!!