Dave Stewart (born David Lloyd Stewart, 30 December 1950) is an English keyboardist and composer known for his work with the progressive rock bands Uriel, Egg, Khan, Hatfield and the North, National Health, and Bruford. Stewart is the author of two books on music theory and wrote a music column for Keyboard magazine (USA) for 13 years. He has also composed music for TV, film and radio, much of it for Victor Lewis-Smith's ARTV production company. He has worked with singer Barbara Gaskin since 1981.