Horse racing is the second largest spectator sport in Great Britain, and one of the longest established, with a history dating back many centuries. It generates over £3.7 billion for the British economy, and the major horseracing events such as Royal Ascot and Cheltenham Festival are important dates in the British and international sporting and society calendar.
The sport has taken place in the country since Roman times and many of the sport's traditions and rules originated there. The Jockey Club, established in 1750, codified the Rules of Racing and one of its members, Admiral Rous laid the foundations of the handicapping system for horse racing, including the weight-for-age scale. Britain is also home to some of the world's iconic racecourses including Newmarket, Ascot and Cheltenham and many of the world's iconic races including The Derby at Epsom, The Grand National and Cheltenham Gold Cup. The UK has also produced some of the greatest jockeys, including Fred Archer, Sir Gordon Richards and Lester Piggott.
Britain has also historically been a hugely important centre for thoroughbred racehorse breeding. In fact all racehorses are called English Thoroughbred, the breed having been created in England. All modern thoroughbred racehorses can trace a line back to three foundation sires which were imported to Britain in the late 17th/early 18th centuries and the General Stud Book first published by James Weatherby still records details of every horse in the breed.