This picture from the 1930's is of a motorcycle dealer in Brecon, Wales. I know it sold Royal Enfields since in the 2001 "The Bullet-in" Aubrey Higgins claims he got his first Enfield there. The three machines at the right may be Enfields. With a few hints from Russell Hindle of the Brecon Library I've visited the place with google street view and this appears to be the place. It appears to be a paint shop, but Russell tells me that currently it is vacant.