I heard that Wilson went to the Americans to borrow money as we were in so much debt and they would let us have some as long as we cancelled Concorde. He agreed, but when he got back and tried to tell the French they refused to let us scrap concorde, so Wilson went back to the Americans and offered to scrap TSR-2 instead and buy F-111s. The Americans liked that idea so gave us the money, hence no TSR-2.
The F-111s had just gone operational in Vietnam and lost quite a few in the first few weeks, so the RAF said no we don't want that pile of rubbish, and the very nice lads in the navy suggested the Bucc.
And so history was rewritten!!