A series of regular blog posts displaying images from “British Cavalry Uniforms of the 19th Century”; a set of trade cards issued by Badshah Tea Co. of London in 1963.
#18: The Royal Horse Guards
“Popularly known as the “Blues”, this regiment was raised in 1661 and is the only cavalry regiment in existence which formed part of the Parliamentary Army during the reign of Charles I. This is a trooper of the “Blues” at the time of Waterloo.”

Sites of interest about the 8th Hussars:
National Army Museum page on the Royal Horse Guards.
My own Waterloo-era Horse Guards figures.
The Household Cavalry Museum in Horse Guards, Whitehall, London.
Excellent short historical overview of the regiment on the British Empire site.