ASCOT, UNITED KINGDOM - 18 JUNE:  Queen Elizabeth II and Duke of Edinburgh Prince Philip arrive for Ladies Day of Royal Ascot at Ascot racecourse in Berkshire, England on June 18, 2015. The 5 day showcase event, which is one of the highlights of the racing calendar, has been held at the famous Berkshire course since 1711 and tradition is a hallmark of the meeting. Top hats and tails remain compulsory in parts of the course. (Photo by Tolga Akmen/Anadolu Agency/Getty Images)