David Richard Bull (born 9 May 1969) is an English doctor, author, and host and commentator on a variety of British and US television programmes, such as Sugar Dome, the BBC's Watchdog, Watchdog Healthcheck,Newsround, Living TV's Most Haunted Live!, Channel 4's Richard & Judy, Tomorrow's World, and Sky's The Breathing Life Awards. He is a regular panelist on "The Wright Stuff" with Mathew Wright Channel 5.