Thanks all for your posts
Julian - My forks do not have the socket cap screws in the bottom of the forks, so we can now completely rule out the 1968 forks. I’ll see if I can get a clear photo of the fork spacing near the yokes, but when measured (twice now) they’re 6 3/4”. The A7/A10 forks look to have different mudguard fixings from what I have seen on Draganfly (likely generic pics though).
Bess - thanks for your pics. It would be helpful if it was known which bikes your spindles were off as a couple of them are likely to fit. I’m no closer to identifying what I have though.
Spaceman - very likely my solution is to turn a new groove on the new spindle. It doesn’t sound like I’m going to have much luck in identifying which forks I have.
Anyone know a machinist in Brighton?