EGHAM, UNITED KINGDOM - JULY 25: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Prince Charles, Prince of Wales treads-in during half time as he attends the Royal Salute Coronation Cup polo match at Guards Polo Club on July 25, 2015 in Egham, England. (Photo by Max Mumby/Indigo/Getty Images)