Jockey Cieren Fallon helped claim a slice of history at Newbury on Saturday as his mount Intercessor triumphed at odds of 200-1.
Fallon, the son of retired six-time champion rider Kieren, edged out the even-money favourite Naswaary by a head in the 4.10 novice race.
It is believed to be the joint longest-priced winner in British flat racing history.
The last 200-1 victor was Dandy Flame at Wolverhampton in July 2016.
Intercessor, trained by John Gallagher at his Moreton-in-Marsh stables, underwent a gelding operation after his only previous run when he finished sixth, 26 lengths behind the winner.
“He had every opportunity to curl up and let them all go past him, but he stuck his neck out when he got past [the rest] and ran on again – it was a good sign to see his will to win,” Gallagher told BBC Radio Gloucestershire.
“He’s got the size and scope to be a nice horse, what we’ve beaten we don’t know – but we’ll soon find out in due course, the favourite was obviously a nice horse.”
“I’ve had a couple of 100-1 winners, but I can’t remember ever seeing a 200-1 winner, so a bit different, but he didn’t know.”
The longest-priced winner in British racing history was Equinoctial, returned at a starting price of 250-1 when winning over hurdles at Kelso in November 1990.
Additional reporting by Paul Furley