British Isotta-Fraschini Armoured Car, Model 1915, belonging to the Westmorland and Cumberland Yeomanry Regiment.

The Westmorland & Cumberland Yeomanry
http://www.1914-1918.net/wmld.htm

Westmorland and Cumberland Yeomanry
http://en.wikipedia.org/wiki/Westmorland_and_Cumberland_Yeomanry

Imperial Yeomanry
http://en.wikipedia.org/wiki/Imperial_Yeomanry

Imperial Yeomanry [1900-1902]
http://web.archive.org/web/20070529010837/http://www.regiments.org/regiments/uk/cav/ImpYeo.htm