His group one winners are: Prohibit. King Stand Stakes, Jwala. Nunthorpe and Goldream.
King Stand and Prix de l"abbaye.
Cowell"s father rode in Point-to-point races and Cowell began his racing career working for Gavin Pritchard-Gordon. He also worked for John Hammond in France and Neil Drysdale in the United States before starting his own training career in 1996 at Hollywood Park Racetrack in California.