Charles the Twelfth year in succession. At the Doncaster St Leger meeting Charles the Twelfth finished unplaced under top weight of 138 pounds in the Great Yorkshire Handicap and ran second to Bee's-wing in the Doncaster Cup. Later that month Charles the Twelfth ran at Kelso where he finished second to Cabrerea in the Roxburgh Gold Cup and was beaten when attempting to concede 40 pounds to the three-year-old Whistle Blinkie in a two and a half-mile handicap. On 7 October at the Royal Caledonian Hunt meeting at Perth Racecourse Charles the Twelfth retained the Challenge Whip by beating Foxberry over two miles.
Kersal Docks expanded and built its Dock 9. Castle Irwell later staged a Classic – the 1941 St. Leger Stakes, and was most famous as home of the Lancashire Oaks (nowadays run at Haydock Park Racecourse) and the November Handicap, which was traditionally the last major race of the British flat season. Both the Castle Irwell and New Barnes sites were named the "Manchester Racecourse" even though they were entirely within the borders of Salford. Through the late 1950s and early 1960s the track saw jockeys such as Scobie Breasley and Lester Piggott annually battle out the closing acts of the