William Cyril Marshall DFC SCM (14 August 1918 – 1 November 2005) was a Thoroughbred horse racing trainer and owner who had the distinction of being the only person to have saddled winners from stables on four different continents. In 1972 a small plane carrying Marshall and his wife Pamela, along with jockey Joe Mercer and racehorse-owner John Howard, crashed after taking off from Newbury Racecourse. The pilot died in the crash but although they were seriously injured, Marshall and his wife and the other passengers survived.