Horse Guards Parade is a large parade ground off Whitehall in central London, and is the site of the annual ceremonies of Trooping the Colour, which commemorates the Queen's official birthday. UK. 4th June 2011
Horse Guards Parade was formerly the site of the Palace of Whitehall's tiltyard, where tournaments were held in the time of Henry VIII. It was also the scene of annual celebrations of the birthday of Queen Elizabeth I.