David John Ryall (5 January 1935 – 25 December 2014) was an English stage, film and television character actor. He had leading roles in Lytton's Diary and Goodnight Sweetheart, as well as memorable roles in Dennis Potter's The Singing Detective and Andrew Davies's adaptation of To Play the King. He also portrayed Billy Buzzle in the ITV sitcom Bless Me, Father and Frank in the BBC sitcom Outnumbered.