Updates!
It's not exactly been smooth sailing with the Claud.
Firstly I stumbled upon the information that the lovely Stronglight 49D cranks that were fitted to the frame have a unique 23.35mm thread and require a unique and expensive crank puller to remove. £50 later...
Next up the wonderful bottom bracket. I spent another £13 on a tool to remove that as I didn't want to marr the lovely cups. Cups it turned out were made of some sort of incredibly soft plastic. The first one came off relatively unscathed...
The second, not so much.
In the end I had to chisel (screwdriver) and hacksaw it out of the frame as it refused to budge and any attempt to unscrew it just mashed it up even more. A real shame cos the SKF bottom bracket itself ran smooth as silk, but unless I can stumble on a replacement for the mangled cup it won't be seeing action again.
A small comfort however is that it appears this set of cranks fits JIS rather than the older ISO (in fact I think the existing BB was also JIS fit).
You might have guessed where this is going. With the perfectly good bottom bracket removed, the frame is now off for powder coating.
I'm a bit melancholy about it, but I really want to build a really nice bike around the frame as I love how it rides. So next time you (and I) see it it'll look quite different.