Changing the Guard at Buckingham Palace is a' must see' for any visitor to London, it's full of tradition, ceremony, and history and although it is a tourist attraction it has not been commercialized, it just happens, so to get the best from the ceremony it is best to get information on what is happening during the ceremony prior to your arrival, there is a handy guide book available on this with Maps, information, history and a detailed rundown of the ceremony itself