The son of racehorse breeder William ‘Bill’ Gredley, Tim began riding at age 10. Although his first foray into competition was with working hunter ponies, the focus soon turned to showjumping. In 2004, he was selected for the Junior European Championship in Vilamoura, Portugal, taking team gold and individual silver with the talented Omelli.
Two years later, Tim and Omelli found themselves making their senior championship debut at the World Equestrian Games in Aachen in 2006.
Tim took a step back from jumping in 2016 to focus on the family business for a few years, while also enjoying time on the racing circuit as an owner, breeder and amateur jockey. He returned to jumping in 2019 and has spent the subsequent years climbing back up the rankings. The hard work paid off when he made his long-awaited return to the British team for the FEI Jumping Nations Cup invitational leg in Abu Dhabi in January, where the team finished second. Tim has since appeared in a further three Nations Cup legs, including on home soil at Hickstead when the British team lifted the trophy for the first time in 13 years.
It might have taken 17 years, but Tim made it back onto a senior championship team in 2023, when he and Medoc de Toxandria represented Great Britain at the FEI Jumping European Championship in Milano, Italy.