The British Classics are five long-standing Group 1 horse races run during the traditional flat racing season.^[1] They are restricted to three-year-old horses and traditionally represent the pinnacle of achievement for racehorses against their own age group. As such, victory in any classic marks a horse as amongst the very best of a generation. Victory in two or even three of the series (a rare feat known as the Triple Crown) marks a horse as truly exceptional.

The five British Classics are:

It is common to think of them as taking place in three legs.

The first leg is made up of the Newmarket Classics – 1000 Guineas and 2000 Guineas. Given that the 1,000 Guineas is restricted to fillies, this is regarded as the fillies' classic and the 2,000, which is open to both sexes, as the colts' classic, although it is theoretically possible for a filly to compete in both.

The second leg is made up of The Derby and/or Oaks, both ridden over 1+1⁄2 miles at Epsom in early June. The Oaks is regarded as the fillies' classic, the Derby as the colts', although, as with the Guineas, a filly could theoretically contest both.

The final leg is the St Leger, held over 1 mile 6+1⁄2 furlongs at Doncaster and is open to both sexes.

The variety of distances and racecourses faced in the Classics make them particularly challenging as a series to even the best horses. It is rare for a horse to possess both the speed and stamina to compete across all these distances, making the Triple Crown a particularly notable achievement. In fact, in the modern era, it is rare for any attempt on the Triple Crown to be made.

Geldings are excluded from the 2000 Guineas, Derby and St Leger, in common with all European Group One races restricted to three-year-olds.

The oldest race in the series, the St Leger, was first run in 1776. The races were designated "classics" in 1815,^[2] shortly after the first 1,000 Guineas Stakes.

(see also Triple Crown of Thoroughbred Racing)

In 1902 Sceptre became the only racehorse to win four British Classic Races outright, winning both Guineas, the Oaks and the St Leger. Previously, in 1868, Formosa won the same four races but dead-heated in the 2,000 Guineas.^[3]

Fifteen horses have won the standard Triple Crown (2,000 Guineas – Derby – St Leger), the last being Nijinsky in 1970. Three of these achieved the feat during the World War I when all five Classic races were run at Newmarket.

In addition to Sceptre and Formosa above, eight horses have won the fillies' Triple Crown (1,000 Guineas – Oaks – St Leger), the last being Oh So Sharp in 1985.

Many horses have won two classics, some of whom have gone on to attempt the Triple Crown, losing in the last leg at Doncaster. The most recent example of this was the Aidan O'Brien trained Camelot, who finished second in the St Leger in 2012 after winning the 2,000 Guineas and Derby.

• Formosa 1868
• Sceptre 1902

Most wins as a horse

• Sceptre – 4 wins (1902)

Most wins as a jockey

• Lester Piggott – 30 wins (1954–1992)^[4]

Most wins as a trainer

• John Scott – 40 wins (1827-1863)
• Aidan O'Brien – 41 wins (1998–present)

• Category:British Classic Race winners
• English Triple Crown race winners
• French Classic Races
• Japanese Classic Races
• Irish Classic Races
• United States Triple Crown of Thoroughbred Racing
• Canadian Triple Crown of Thoroughbred Racing