After riding freelance for a bit, he was to become first jockey to trainer Sir Mark Prescott in 1974, a partnership which was to prove most enduring and fruitful.
George Duffield spent 30 years as stable jockey to Prescott, riding 830 winners for him, including successes in Ireland, France and Belgium.
George was also used by Aidan O'Brien, and had two Group 1 victories for the Ballydoyle stable, when winning the 1999 Racing Post Trophy on Aristotle and the 2000 Eclipse Stakes on Giant's Causeway.
George Duffield also entered the Guinness Book of Records in 1980, for winning 11 consecutive races (and 13 in all) on the brave two-year-old Spindrifter.
His autobiography Gentleman George was published in 2002; in it, he admitted punching BHB chairman Peter Savill during a row at Beverley.