Zelda was great! Our tour was delayed by viewing all the events of the 100th Anniversary of the RAF at Buckingham Palace. Saw the 100 aircraft flyby Trafalgar Square and even the Queen!! We volunteered to make up some time on the return, but Zelda couldn't resist stopping and showing us each sight, even though we were about 1.5 hours delayed. Thank you so much for the highlight of our London trip.