In 1914 you could buy a Royal Enfield at Evans of 87-91 John Bright Street.
The address corresponds to a building that was a theater called "The Futurist". Apparently the project was started in 1914, but delayed till 1916 due to the war. Mr. Evans must have moved I guess.
Eventually in the 1990's it became a member of the Cannon cinema chain. It closed and remained derelict until it reopened as a gentlemen's club that underwent various names. Currently it appears to be vacant.