JOCKEY Robert Tart enjoyed his biggest success to date when partnering The Black Princess to victory in the Group 2 bet365 Lancashire Oaks at Haydock.

The 24-year-old timed his run to perfection on the John Gosden-trained 3/1 chance to collar the 6/4 favourite Abingdon and take the mile and a half contest by half a length. Ajman Princess was a length away in third, with the winner's stablemate Hertford Dancer fourth.