Queen Elizabeth II stands on a dais outside Buckingham Palace during the annual Trooping the Colour Ceremony on June 15, 2013 in London, England. Today&#39;s ceremony which marks the Queen&#39;s official birthday will not be attended by Prince Philip the Duke of Edinburgh as he recuperates from abdominal surgery. This will also be The Duchess of Cambridge&#39;s last public engagement before her baby is due to be born next month.