The version of Swallow that you can see in the photo is a proposed strategic bomber in which the entire tailcone is a nuclear missile that was
supposed to be jettisoned after the aircraft had already turned safely for home before firing up and continuing its journey to the target.
This method of delivery was borne direct out of the personal guilt felt by Barnes Wallis that so many aircrew had lost their lives in delivering his
bouncing bomb on the famous Dambuster raid by 617 Sqn in 1943.
An SST variant was also proposed long before the Concorde project with the swing wings having the benefit of reducing landing and take off speeds
foreshadowing the Boeing 733/2707 of more than a decade later.
A unique feature of both versions of the Swallow was the 'elevator cockpit'. This served the same purpose as the droop snoot of concorde but instead
of lowering the nose, the entire flight deck, which was contained in a circular tub, was raised above the fuselage to increase vision. This accounts
for the odd window arrangement in the OP's photo.
The engines were not strictly vectored thrust as we understand it, they merely allowed for the thrust line to remain unaltered as the wing swung back
and forth as can be seen in the drawing below which shows a much smaller version proposed as an alternative to what later became the TSR 2
A variant of this concept was also proposed for a naval fighter, albeit with a conventional fuselage, called the vickers 581 which can be seen
It was this design that Wallis took to the USA with him and after taking on his ideas, as mentioned in the first post, the end result was the F-111.
The F-111 was not developed directly from the Vickers 581, it was a new design, but Wallis' calculations and research experience was put to extensive
use on the latter project.
The only visual clue to any link at all is the way the F-111's wing glove blends into the upper fuselage just behind the canopy. This was a feature
of Wallis' type 581, but not of any other VG aircraft before or since.
Back in the UK the Vickers fighter was further evolved into the type 589 which retained its Lightning style wing profile but was otherwise much more
like the VG aircraft we are used to. Via the P.45 and AFVG this led directly into the Panavia Tornado.
[edit on 22-6-2008 by waynos]