LONDON, ENGLAND - JUNE 13:  Troops and members of the Royal Family make their way from Horseguards Parade during the annual 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 Carl Court/Getty Images)