Prince Louis joined his brother and sister Prince George and Princess Charlotte on the Buckingham Palace balcony for Trooping the Colour. <br />They waved at crowds outside the palace and RAF planes making their flypast. <br />The event, which involved marks the official Birthday of the Queen, involves over 1400 officers and infantrymen on parade. Report by Carrf. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn
