Sally Rowley-Williams, Owner of Special Tiara following victory in the Betway Queen Mother Champion Chase during Ladies Day of the 2017 Cheltenham Festival at Cheltenham Racecourse. (Photo by David Davies/PA Images via Getty Images)

Sally Rowley-Williams, Owner of Special Tiara following victory in the Betway Queen Mother Champion Chase during Ladies Day of the 2017 Cheltenham Festival at Cheltenham Racecourse. (Photo by David Davies/PA Images via Getty Images)

Camilla, Duchess of Cornwall, and Robert Waley-Cohen watch the Betway Queen Mother Champion Chase during Ladies Day of the 2017 Cheltenham Festival at Cheltenham Racecourse. (Photo by Andrew Matthews/PA Images via Getty Images)

Camilla, Duchess of Cornwall, and Robert Waley-Cohen watch the Betway Queen Mother Champion Chase during Ladies Day of the 2017 Cheltenham Festival at Cheltenham Racecourse. (Photo by Andrew Matthews/PA Images via Getty Images)

CHELTENHAM, ENGLAND - MARCH 15: Camilla, Duchess of Cornwall, Honorary Member of the Jockey Club, attends the second day of The Festival, Ladies Day, at Cheltenham Racecourse on March 15, 2017 in Cheltenham, England. (Photo by Eddie Mulholland-WPA Pool/Getty Images)

CHELTENHAM, ENGLAND - MARCH 15: Camilla, Duchess of Cornwall,  Honorary Member of the Jockey Club, attends the second day of The Festival, Ladies Day, at Cheltenham Racecourse on March 15, 2017 in Cheltenham, England. (Photo by Eddie Mulholland-WPA Pool/Getty Images)

CHELTENHAM, ENGLAND - MARCH 15: Chanelle McCoy speaks with Camilla, Duchess of Cornwall as they attend the second day of The Festival, Ladies Day, at Cheltenham Racecourse on March 15, 2017 in Cheltenham, England. (Photo by Eddie Mulholland-WPA Pool/Getty Images)

CHELTENHAM, ENGLAND - MARCH 15: Chanelle McCoy speaks with Camilla, Duchess of Cornwall as they attend the second day of The Festival, Ladies Day, at Cheltenham Racecourse on March 15, 2017 in Cheltenham, England. (Photo by Eddie Mulholland-WPA Pool/Getty Images)

Camilla, The Duchess Of Cornwall (centre), cheers on horses in the Neptune Investment Management Novices' Hurdle during Ladies Day of the 2017 Cheltenham Festival at Cheltenham Racecourse. (Photo by Andrew Matthews/PA Images via Getty Images)

Camilla, The Duchess Of Cornwall (centre), cheers on horses in the Neptune Investment Management Novices' Hurdle during Ladies Day of the 2017 Cheltenham Festival at Cheltenham Racecourse. (Photo by Andrew Matthews/PA Images via Getty Images)