Name the British-American musical fantasy film produced by Walt Disney Productions based upon the book 'How to Become a Witch in Ten Easy Lessons' which features the fraudulent magician Professor Emelius Browne who was played by David Tomlinson the English actor and comedian?
David Tomlinson: David Cecil MacAlister Tomlinson (7 May 1917 – 24 June 2000) was an English stage, film and television actor and comedian. David Tomlinson:  Having been described as both a leading man and a character actor, he is primarily remembered for his roles as authority figure George Banks in "Mary Poppins", fraudulent magician Professor Emelius Browne in "Bedknobs and Broomsticks" and as hapless antagonist Peter Thorndyke in "The Love Bug". Bedknobs and Broomsticks:  It is based upon the books "The Magic Bedknob; or, How to Become a Witch in Ten Easy Lessons" (1943) and "Bonfires and Broomsticks" (1945) by English children's author Mary Norton.
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