[4] She changed to show jumping and won many Grand Prix competitions including Brussels, Geneva, 's-Hertogenbosch, Paris, Berlin, Toronto, Chile, Luxembourg, Monaco, Madrid, Mexico, Amsterdam, South Africa, Palermo and Great Britain.

She represented Great Britain for 14 years on the Olympic Nations Cup Team and was awarded the FEI Badge of Honour.

She holds the ladies' world high jump record at 2.36 meters, set with the horse Sporting Ford.

[clarification needed] She later ran Penny Place Stables in Johannesburg, Gauteng, South Africa, where she taught pupils at all ages and skill levels.

Drummond-Hay was mentioned in the Monty Python's Flying Circus "Trailer Sketch" (narrated by Eric Idle) in the "Archaeology Today" episode in Season 2 where she was riding Mister Softee while being the wife of Jim Laker.