Other movies honoured at Grosvenor House Hotel event included 28 Weeks Later for best horror film, HotFuzz won best comedy and Stardust was named best sci-fi film.
Mr Swain has worked as a voice coach with many well-known actors and his credits include Atonement, HotFuzz and The Boat that Rocked, but he admits that he was amazed by the talent involved in The King's Speech.