The Queen and Prince Philip attended the Trooping the Colour, which marks the official birthday of the British Sovereign. It is held annually in June on Horse Guards Parade, by St. James's Park. UK. 11th June 2011
In the United Kingdom, Trooping the Colour is also known as the Queen's Birthday Parade. It has marked the official birthday of the Sovereign since 1748, and has occurred annually since 1820 .
Trooping the Colour allows the Household Division and King's Troop to pay a personal tribute to the Sovereign with great pomp and pageantry. Crowds lining the route and in St. James's Park listen to music performed by both Massed and Mounted Bands. The Queen has attended Trooping the Colour in every year. Her Majesty started riding in a carriage in 1987.