Hi,
Just found some nice pictures of Royal Enfield WW1 motorcycles.
The story is :
In previous years, Royal Enfield had fitted a Maxim machinegun to one of its sidecar combos for publicity purposes. In a memorable snafu, the machinegun (which was not operational) was seized by customs on its way to a show in Ireland early in 1914, where there were restrictions on the importations of guns due to the political unrests there. At the outbreak of the war the machinegun-enabled combo was rushed to the Ministry of Munitions and an order for 6hp's with strengthened chassis was received. Vickers guns were mounted on the sidecar chassis and they could be swivelled in any direction, forward, backward, sideways, even used as anti-aircraft gun. A padded seat and backrest were provided for the machinegun operator. Another model was fitted with a stretcher to carry wounded.
The info and pictures came from this website :
http://myroyalenfields.blogspot.be/2009/12/1915.html
Kind regards,
Glenn