Which Derby winners were sired by a Derby winner out of an Oaks winner?

Often referred to as the second colts’ Classic – although it is actually open to three-year-old colts and fillies, but not geldings – the Derby is run over a mile and a half at Epsom on the first Saturday in June, as day after the fillies’ equivalent, the Oaks, over the same course and distance. The famously idiosyncratic, switchback course at Epsom demands balance, speed and stamina and, as such, does not suit all horses. Nevertheless, it has been described by Aidan O’Brien – who, at the time of writing has won the Derby a record 10 times – as “the complete test of a horse”.

The Derby commands revered status, as does the Oaks, albeit to a lesser extent, as reflected by reflected by guaranteed prize money of £1.5 million and £550,000 respectively. Beyond the racecourse, the economic impact of winning the Derby on stud fees cannot be underestimated, with the 2009 European Horse of the Year, Sea The Stars, for example, fetching €250,000 a time at Gilltown Stud.

It would be fair to say that Derby winners resulting from the blue-blooded coupling of a Derby winner and an Oaks winner have been few and far between. Lammtarra, the 1995 Derby winner, was sired by Nijinsky, who won the Epsom Classic in 1970 en route to becoming the last horse to win the Triple Crown, out of Snow Bride, who was awarded the 1989 Oaks after the first past the post, Aliysa, was subsequently disqualified after testing positive for a banned substance. More recently, the 2014 Derby winner, Australia, was sired by Galileo, who won the 2001 Derby before becoming a phenomenon at stud, out of the 2004 European Horse of the Year, Ouija Board, who completed the Oaks-Irish Oaks double during her three-year-old campaign.