Lance-Corporal Jack Jones is a fictional Home Guard platoon lance-corporal , veteran of the British Empire and butcher , portrayed by Clive Dunn in the BBC television sitcom `` Dad 's Army '' .
Lance Corporal Jack Jones is a fictional Home Guard platoon lance-corporal , veteran of the British Empire and butcher . He was played by Clive Dunn in the BBC television sitcom `` Dad 's Army '' and by Tom Courtenay in the upcoming 2015 movie `` Dad 's Army '' .