Although these suppliers don't match your search for Magicians in London, they are within approximately 40 miles and could still be of interest.
Entertainment, Magicians, Camberley, Surrey
Steve Cantwell is a world class magician and speaker. He performs close up and stage magic at weddings and other celebrations. He is also the author of three psychology books, and he teaches managers and leaders (using magic, of course) how to make better, more rational, decisions. (Magicians in London)