Hi All,
The bike in the first photo is a pre 38 Ariel Red Hunter, before the alloy rocker boxes came in.
Second bike is a 1923 or 24 BSA model L 350ohv and looks to be in "New" condition
I have the same model and can be fairly certain of the year as the front forks do not have friction discs
The 25 fork links have a bigger diameter at the rear to accommodate small friction discs
Third bike looks to be an M20 ex WD ??
John