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LONDON, ENGLAND - JUNE 13: (L-R) Prince Andrew, Duke of York, Catherine, Duchess of Cambridge, Camilla, Duchess of Cornwall, Prince Harry, Princess Eugenie and Princess Beatrice stand on the balcony of Buckingham Palace following the Trooping The Colour ceremony on June 13, 2015 in London, England. The ceremony is Queen Elizabeth II's annual birthday parade and dates back to the time of Charles II in the 17th Century, when the Colours of a regiment were used as a rallying point in battle. (Photo by Chris Jackson/Getty Images)

LONDON, ENGLAND - JUNE 13:  (L-R) Prince Andrew, Duke of York, Catherine, Duchess of Cambridge, Camilla, Duchess of Cornwall, Prince Harry, Princess Eugenie and Princess Beatrice stand on the balcony of Buckingham Palace following the Trooping The Colour ceremony on June 13, 2015 in London, England. The ceremony is Queen Elizabeth II's annual birthday parade and dates back to the time of Charles II in the 17th Century, when the Colours of a regiment were used as a rallying point in battle.  (Photo by Chris Jackson/Getty Images)