The four-star mare Chapel Amble, who completed Badminton with Nick Gauntlett and Burghley with Jules Stiller, was put down yesterday (11 October).
The 15-year-old by Amerigo Vespucci was with Jules at Headley Stud, Berkshire when she was diagnosed with a suspected aneurism.
“She will be greatly missed by myself and Nick as well as the whole Arscott family who used to own her,” said Jules.
“She was a very special, much-loved horse, who was truly one of a kind.”
Chapel Amble came 44th at Burghley in 2011 and 21st at Badminton in 2010.
Her last event was at Barbury with Jules in June this year, where she finished 43rd.