Someone asked me off list about London tricycle makers. Very sorry lost your name and email address. But this might be of some interest to others on the list. Buckley Brothers prolific South London frame builder had two shops Beresford Street, Camberwell Gate, S.E.5 and Wells Road, Sydenham, S.E.26. They started in 1919 and survived into the 1950's. There first lightweight racer weighed 17.5 lbs. They built a special for a lightweight show which weighed in at only 13lbs. in the days of steel components. This model went into production as their famous "Model C" Path Racer. they also built Taper tube models. All of their time trial frames could be fitted with square to round chainstays. A feature on their ladies lightweights was that the seat clamp was fitted in reverse with the bolt facing the peak of the saddle. They were pioneers in using Round Taper Stays on tandems and were very famous for their racing tricycles. As I have said before each individual frame maker was stongly connected with a club Buckleys was the Rodney C.C.
Best wishes and be lucky. Michael Butler Huntingdon UK.