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.

Sword Fighter was bustled up straight from the gates to take the lead, but Muntahaa soon went on with The Tartan Spartan third, Ventura Storm fourth and Idaho well placed.

When the field turned for home with the long straight in front of them there was no hint of the drama to follow, as Idaho was just about to make his move. His Aidan O'Brien-trained stablemate Housesofparliament kicked for home, but was soon joined by Ventura Storm.

The latter, trained by Richard Hannon, held a narrow advantage in the final furlong for Silvestre de Sousa, but Harbour Law (22-1) came with a wet sail to give jockey George Baker his first classic success.

Harbour Law won by three-quarters of a length from Ventura Storm, with Housesofparliament a short-head away in third.

Baker said: "I can't believe it, I'm so happy for Ian and Laura, they had so much faith in him and really deserve it. It's an amazing feeling to win the Leger. I worked him at Kempton about two weeks ago and he felt brilliant. When Idaho clipped heels it made it a very open race."

Mongan said: "It was brilliant! I think I screamed a lot. I'm in shock. I'm so glad we came here and he's proved that he can do it. We didn't want to ride him like that, but George knows what he's doing and all credit to him. We knew we could leave it to him.

"It was a really professional performance by the horse, we knew he'd go somewhere in life. It proves we can do it with the ammunition, it's great to have a horse like this and bring him here for a race like this.

"It's a bit surreal. I hope we are lucky enough to hold on to him."