Hello again and Happy New Year everyone, thanks for your helpful comments.
I now find in faint lettering “229F/1D” on the inlet side. The carb has been bored out and a home made slide looks good. It is appreciably deeper than a standard 276 slide though and this accounts for the richness of the mixture I think as the needle is held higher up. Also the needle looks home made or adapted from another.
Choke size is 1.10″ and it fits a stub of 1.27″ o.d.
Any thoughts?
