Brake lever cotters

[Tony Griffiths]

so are there some Y in circulation, or were there in the past? I read something about the latter on an old thread but can't remember how old it was.

I believe that there are - that's why I wondered if the "centre thread" design would work. I suppose, at a pinch, one could imitate the emergency repair my school friend Paul Dougdale carried out on his new, envy-of-the-rest-of-us Claud Butler bicycle - just bash in a filed-down bolt with a lump hammer (only joking - about the Austin - not the Claud Butler).