A set of WW spanners should fit all the nuts and bolts on a BSA. At least a good one that is.
First thing I did when I acquired the A10 was getting myself a set of King Dicks. They fit like a glove. Absolutely happy with them
On some bikejumble however, I got myself dragged into buying a cheap set of WW which are absolute rubbish
In the set of 10, there's only one that fits. The others are either to tight or to loose
Lesson learnt.......€35 down the drain