Yarmouth: Winner Mandarin Princess was actually stablemate Millie's Kiss

Runners in a horse race

British horse racing’s governing body is to investigate after the ‘wrong horse’ won a race at odds of 50-1.

Two-year-old Mandarin Princess, trained by Charlie McBride, was declared winner of Thursday’s 13:40 race at Great Yarmouth after beating Fyre Cay.

But a scan afterwards identified the horse as three-year-old stablemate Millie’s Kiss, who had been due to run in a later race at the same course.