LONDON, UNITED KINGDOM - JULY 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince Charles, Prince of Wales, Camilla, Duchess of Cornwall and Queen Elizabeth II watch a flypast to mark the centenary of the Royal Air Force from the balcony of Buckingham Palace on July 10, 2018 in London, England. The 100th birthday of the RAF, which was founded on on 1 April 1918, was marked with a centenary parade with the presentation of a new Queen's Colour and flypast of 100 aircraft over Buckingham Palace. (Photo by Max Mumby/Indigo/Getty Images)
