Dapple gray Lusitano horse. I remember the song by Peter, Paul, Mary, "All the Pretty Little Horses." One of the lines is about "dapples, and greys, pintos and bays..." Maybe they were singing about a Lusitano?
Marathon (1968) Marathon came to the UK courtesy of Forrest Mars Sr, estranged from the family business in the States, but free to adapt the recipes for European tastes. Aside from his eponymous bar packed with milk, sugar, glucose, and thick, thick chocolate, Mars' Slough-produced cash cow was a peanut-powered derivative of the American Snickers (the name was apparently tribute to the Mars family's favourite horse) 'brand alignment' saw Marathon adopt its maiden name in 1990
The oldest remaining white horse, and certainly the most beautiful, is probably the uffington horse, which is dated to the bronze age or early iron age, possibly over 3,000 years old. So local people have kept it cleared and told its stories as cultures and ideas have come and gone and changed over the centuries.