1200 Guineas Stakes 1st Earl of Gower and Thomas Duncombe. They agreed the race was to be run over the Beacon course at Newmarket and would be open to five-year-old horses and mares. They paid a 100 guineas subscription each to enter their horse and all runners would carry nine stone. The race was initially to be run for five consecutive years from 1757, but was subsequently renewed in 1762. Leading owner (4 wins): 1200 Guineas Stakes The 1200 Guineas Stakes was a flat horse race in Great Britain open to thoroughbreds aged five years. It was run at Newmarket and was one
Commonwealth Cup (horse race) races in Europe. The Diamond Jubilee Stakes, run over the same course and distance at the same meeting, was closed to three-year-olds at the same time. The new race was subsequently named the Commonwealth Cup and the Buckingham Palace Stakes was removed from the Royal Ascot meeting to make room for the new race. ---- Commonwealth Cup (horse race) The Commonwealth Cup is a Group 1 flat horse race in Great Britain open to horses aged three years. It is the only Group 1 flat race in Great Britain exclusively for three-year-olds that allows geldings to compete and the first