"Is there not something 'odd' going on with the rear of the frame, centre stand and swinging arm?"
No jefrs, that's a 1960 Redditch Royal Enfield frame, as used on the later British built Bullets and twins. The swinging arm is standard Indian Bullet which will fit the Redditch frame with the right bits and a couple of spacers, centre stand is also standard Indian Bullet (a big improvement over the Redditch cast alloy effort, eh Scaly?). Possibly the battery mounted under the swinging arm pin (with the terminals well protected against road muck/wet counts as odd, but apart from that it is all royal Enfield, just not all from the same factory. The plan was to build a sort of kick-start only version of the Electra-X in the British frame, for no reason other than the fact that someone had to attempt it, and I rather felt that it should be me. After some playing with the styling a bit, I'm quite pleased with how it turned out.
That colour is (I think) classic burgundy Sandtex garage door paint, with the tank sprayed with as close a match as my paint sprayer could manage...
Blame this steam roller:
A.