The AW.681 and P.1154 were cancelled in February 1964, with the intention announced to order 'anglicised' versions of the C-130 and the Phantom in their place. TSR.2 was cancelled in April 1965. An earlier proposal had been for BAC and Lockheed to produce a Rolls-Royce Tyne-engined Hercules with boundary layer control under the designation BAC.222. This would have been a most interesting aircraft.
March's Aeroplane Magazine had a couple of articles abut the 'big three', as it called them. The AW.681's role was seen in the early 1960s to airlift expeditionary forces to colonial outposts and deliver them into unprepared airstrips, while also carrying construction equipment to extend and improve the facilities. Separate VTOL and STOL variants, which ended up being quite different, were planned, but the former was abandoned long before final cancellation. The decision to concentrate on Europe meant that it did not fit too well into the way NATO expected a future war to go, and the STOL capability was seen as irrelevant. I like to think that had they just gone for an ordinary freighter without all the STOL or VTOL gubbins it may well have survived and ended up as an alternative to the C-130 in the export market. The size was very similar and without the STOL mods the payload would have been similar as well.