Update (despite what I previously said - it didn't allow for an unexpected development such as this):
The bike's finished, but the LH fork leg is bent
I'd suspected this initially from looking at one of the photos I took when the bike was on the trailer but then in the flesh we agreed that it looked straight so I put it down to an optical illusion with the camera. It's not really visible but my man working on it said he felt it as soon as he rode it out of their forecourt.
He says the guy who did the welding on the frame has a spare one which he'll fit tomorrow. I did initially ask him to trailer it to my house as changing the fork is something I could easily do, but he did say then he wouldn't be able to give the bike his 'seal of approval'...he's keen to road test it and give it the thumbs up after he's done this quite significant work on it, which I conceded to.
If for some reason the fork he has is no good then I may be asking on here again
Won't be long, won't be long...