Pax Brit'
TSR2,P1154 and the 681 ( think I've got the last 2 right ) were all cancelled by Harold Wilson's Labour government shortly after their election in October 1964.
Many years later IIRC the ST Insight team published an article that claimed Labour promised to 'The Cousins' that we would scrap TSR2 and buy the F111 if they gave us a free hand in selling the Lightning to the Saudis. They claimed that we reneged on the deal once the Saudi contract was secure.
I think the F111 was in service with the USAF in the late 60s.