British Cycle Company, Bury St Edmunds, Suffolk, England.    (click to enlarge)
“There is plenty of stern work for cyclists battalions as soon as they are trained to do it–so the time to join is now.” ~Recruitment ad, 1915
Lest we forget, the bicycle played an important part in military operations from the earliest days of its invention. The linked Wikipedia entry and BSA Museum detail the history of the velo as a war machine.
Interesting Remembrance Day reading.
Bicycle Infantry | The BSA & Military Bicycle Museum