Joseph O’Brien is attempting to make the weight so as to ride Australia in York’s Juddmonte feature. Photograph: PA

Considering how Sea The Stars and Frankel are on the Juddmonte International roll of honour it’s odd to see York’s most prestigious race as somethi(...)

Joseph O’Brien will again be in the saddle on Australia for Wednesday’s Juddmonte International at York. Photograph: Morgan Treacy/Inpho

Aidan O’Brien’s dual Derby hero Australia will face five rivals in the Juddmonte International at York on Wednesday.Since being narrowly beaten into t(...)

Kieren Fallon on Cavalryman (left) wins The Goodwood Cup ahead of Harry Bentley on Ahzeemah. Photograph: Eddie Keogh/Reuters

Cavalryman showed he was as good as ever at the age of eight as he powered to victory in the Artemis Goodwood Cup. Godolphin’s eight-year-old became t(...)

 Joseph O’Brien rides Highland Reel (left) to win the Veuve Clicquot Vintage Stakes at Goodwood yesterday. Phototograph: Alan Crowhurst/Getty Images

The Aidan O’Brien-trained juvenile Highland Reel had a striking victory in the Veuve Clicquot Vintage Stakes at Goodwood yesterday. Sent off the odds-(...)

Britain’s Queen Elizabeth II with her horse Estimate in the winner’s enclosure after it wins the Gold Cup at Royal Ascot last year. Photograph: AFP Photo.

Queen Elizabeth’s 2013 Ascot Gold Cup heroine Estimate has tested positive for morphine, Buckingham Palace announced yesterday.Michael Stoute’s five-y(...)

Mango Diva ridden by Ryan Moore (second right) on the way to winning the Kilboy Estate Stakes from second placed Lahinch Classics ridden by Wayne Lordan  at the Curragh. Photo: Brian Lawless/PA

It cost Ryan Moore a one-day suspension for his use of the whip but the English raider Mango Diva secured an exciting Group Two success at the Currag(...)

Tarasha is joint-second favourite for Saturday’s  Irish Oaks at the Curragh. Photograph: James Crosbie/Inpho.

Sheikh Hamdan’s Shadwell organisation looks to have a firm grip on Saturday evening’s Darley Irish Oaks with the hot-favourite Taghrooda backed up by (...)

Ryan Moore: reportedly in line for mount on Verrazano. Photograph: Steve Parsons/PA Wire

Aidan O’Brien may have already won three classics and an Ascot Gold Cup so far in 2014 but his belief that the massive Ballydoyle string is only no(...)

Winner Leading Light ridden by Joseph O’Brien celebrate their victory in the Gold Cup during Day Three of the 2014 Royal Ascot Meeting at Ascot. Photograph: David Davies/PA Wire

Hot favourite Leading Light narrowly denied the Queen’s defending champion Estimate in a pulsating climax to the Gold Cup at Royal Ascot.Last year’s Q(...)

Bracelet ridden by Joseph O’Brien before winning the Ribblesdale Stakes during Day Three of the 2014 Royal Ascot Meeting at Ascot. Photograph: Steve Parsons/PA Wire

Bracelet bounced back from her disappointing display in last month’s Qipco 1000 Guineas to give Aidan and Joseph O’Brien victory in the Ribblesdale St(...)