LAURA Mongan became the first woman to train the winner of the Group 1 Ladbrokes St Leger when Harbour Law got up close home to win the world's oldest classic at Doncaster.

In a dramatic race that saw hot-favourite Idaho appear to take a false step just under four furlongs out and unship Seamie Heffernan, Harbour Law made history for his Epsom trainer and her husband, former jockey Ian Mongan.