Geoffrey Durham
From Tardis Wiki, the free Doctor Who reference
Geoffrey Durham (born 1949), otherwise known as the Great Soprendo, coached Sylvester McCoy in magic for The Greatest Show in the Galaxy. He helped with the sleight-of-hand and other magic trick scenes. He is notable for being the first magic consulter involved in a production of a Doctor Who story since The Talons of Weng-Chiang in 1977.