This is the story so far...
They just couldn't get new spokes the correct size (four years old, and foreign make)
Decided - around 3.00am one morning - to dismantle front wheel, which was the same sort as the rear wheel, and rebuild the back wheel using the front.
Back to Everndens, who were just great, but couldn't get the spokes for the new front wheel, as the hub had the same issue that the rear one did, i.e. too large!
Bit the bullet and bought a new wheel for the front - nice one too, they rang me the next day!
(Put old rim on Ebay - don't hold your breath)...
Re-laced the rear wheel to correct size and shape.
Replaced tyres just now and refitted rear wheel, just to see that the basic fit is correct - it is so far...
So tomorrow it'll be readjusting everything at the back, re-fitting the front wheel and disc brake, which may be OK, but the rear brakes may take a lot of patience!
Hey ho - I've also discovered a substitute for Swarfega - Cif!
(Might even cut the hedge too)!