In pictures: Trooping the Colour marks King's official birthday

In pictures: Trooping the Colour marks King's official birthday Crowds have gathered for the annual Trooping the Colour to mark King Charles III's official birthday. The parade set off from Buckingham Palace, with King Charles and Queen Camilla making their way in a carriage along The Mall to Horseguard's Parade. As royal colonels, the Prince of Wales, the Princess Royal and the Duke of Edinburgh rode on horseback, while other attendees included the Princess of Wales and her three children while the Duchess of Edinburgh travelled by carriage. The celebrations culminated with a Red Arrows flypast, watched by the Royal Family from the balcony at Buckingham Palace.