Jockey Richard Hughes pulled off a 10,168-1 seven-race victory at Windsor this afternoon.
The 39-year-old won the opening five races of the eight-event meeting on board Pivotal Movement, East Texas Red, Amanda Perrett's Embankment, Magic Street and Links Drive Lady.
He was only able to finish third with Ever Fortune in the sixth race, but responded with victories on top of the Duke Of Clarence and Mama Quilla.
"I feel over the moon," said Hughes. "I always said I might do it one day at Windsor, [which is] my lucky track. Without Richard Hannon I wouldn't be doing any of it."
Frankie Dettori is the only other jockey to ride seven winners on a card in Britain. The Italian achieved that feat at Ascot in 1996.