Mark Johnston is a prominent British horse trainer known for his success in flat racing. He has trained numerous winners in prestigious races, including the Epsom Derby and the Royal Ascot. His training yard is located in Middleham, North Yorkshire, where he has developed a reputation for nurturing young talent and producing competitive racehorses. Johnston began his training career in the late 1980s and quickly gained recognition for his innovative methods and dedication to the sport. Over the years, he has achieved a remarkable number of victories, making him one of the most successful trainers in British racing history. His commitment to excellence continues to influence the racing community.