If we are talking genuinely alternate history aircraft, well you need a bit of snowball effect to make this one fly;
but I have a timeline where, amongst lots of other things the TSR2 doesn't quite live up to it's promise, being a fine airframe virtually paralysed by a hopeless kludgy mess of electronics, and the projected build run is cut short at four squadrons and an OTU's worth, tweaked and optimised as intruders- what the Americans would have called wild weasel - which means it needs replacing there and then as a theatre medium bomber.
The Royal Navy at this point has the Blackburn P.150 enlarged supersonic Buccaneer to play with, and wonderful fun it is too, but RFC Bomber Command just has to be different; and what they choose in the end is the Fairey Fencible B(I).1, effectively FD-IV, fifty- six thousand pounds dry weight, one hundred and forty- eight thousand maximum, 87ft length, 61ft span, two crew, twin- tailed canard delta built around two of the Olympus 622 engines originally developed for Concorde phase 2. Sixty-eight thousand pounds of fuel, twenty-four thousand pounds bombload on ninety thousand pounds dry thrust. Totally AH of course, but supercruising as the earlier 593 did that could be an 1800- mile strike radius, all of it at or above Mach 2. 'Baby Bombcorde' might really have been the way to go. Ah, well.