Geoffrey Durham
From Tardis Wiki, the free Doctor Who reference
Geoffrey Durham, (born 22 July 1949[1]) 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.
Durham is notable for being the first magic consultant involved in a production of a Doctor Who story since the uncredited contributions of Ali Bongo and Larry Barnes for The Talons of Weng-Chiang.