The English Thoroughbred (PSI) is an equine breed native to Great Britain. They are horses well known for their agility and speed. It is a breed selected for galloping in racecourses.

Officially, the modern origins of the English thoroughbred date back to 1793 with the birth of the Stud Book (book of origins or genealogical book of racehorses) by the famous 50 indigenous mares, the Royal Mares, and by three eastern stallions: Byerly Turk, Darley Arabian and Godolphin Barb, from whom all modern racing thoroughbreds descend in the male line. 

Modern studies show that in reality the selection of the English racehorse began much earlier: already from the conquest of Britain the Romans brought to that land eastern horses, especially the Berber, which were used for racing in the Circus Maximus. From that moment on there was a continuous influx of eastern horses into England, especially during the Crusades, and through exchanges with Italy where the Palii ran from the Middle Ages. 

These horses have been selected, as the Anglo-Saxon name thoroughbred indicates, for galloping races: from the beginning, therefore, their power and their aptitude for speed rather than specific physical characteristics have been preferred.

A classy horse, endowed with a long and powerful action, very nervous that does not suit beginner riders; his main attitude is galloping (horse racing), but he also excels in horse riding, especially in the full competition, where almost all English thoroughbreds are the mounts of the Australian and New Zealand teams. He is courageous, trustworthy and affectionate towards the master.