The group of four troopers are depicting the current (circa 1920) and historical recreations of uniforms of the 11th Prince Albert's Own Hussars. From left to right:
Trooper, Service Dress, 11th Light Dragoons, circa 1832
Trooper, Full Dress, 11th Light Dragoons, circa 1822
Trooper, Full Dress, 11th Hussars, circa 1920
Trooper, Service Dress, 11th Light Dragoons, circa 1785
This identification is based upon Plates 73 and 74 and accompanying text contained in the book Richard Simpkin's Uniforms of the British Army The Cavalry Regiments, W.Y. Carman, Webb and Bower, Exeter, England, 1982
Copyright Joy and Ivan Bowen
Many Thanks