(CNN) It is the richest horse race in Britain and spawned a host of equivalents around the world, but the original Derby only received its name on the toss of a coin. One more flip could have given rise to the Epsom Bunbury, the Kentucky Bunbury, the Irish Bunbury and so on. It would be named after the party's host, the 12th Earl of Derby, or one of the guests, Sir Charles Bunbury, depending on the toss. Derby Day began as a Londoners' day out, where top-hat-and tail-wearing aristocrats mix with artisans of every persuasion. "Epsom is the complete test of a horse," trainer Aiden O'Brien, who has saddled five Derby winners including Galileo, told BBC Sport.

Source: CNN June 01, 2017 10:04 UTC