WINDSOR, UNITED KINGDOM - MAY 15: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II, Hamad bin Isa Al-Khalifa, King of Bahrain and Prince Andrew, Duke of York attend the Endurance event on day 3 of the Royal Windsor Horse Show in Windsor Great Park on May 15, 2015 in Windsor, England. (Photo by Max Mumby/Indigo/Getty Images)