ATTARD, MALTA - NOVEMBER 27: Queen Elizabeth II talks to the Secretary General of the United nations Ban Ki Moon during a private audience at the San Anton Palace on November 27, 2015 near Attard, Malta. Queen Elizabeth II, The Duke of Edinburgh, Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall arrived yesterday to attend the Commonwealth Heads of State Summit.  (Photo by John Stillwell-Pool/Getty Images)