He has had smaller roles in many programmes including Red Dwarf, Lovejoy, Manchild, and Diamond Geezer. Warrington portrayed the villainous founder of Time Lord society, Rassilon, in several Doctor Who audio plays, and also appeared as the President of an alternate universe Great Britain in the Doctor Who episode "Rise of the Cybermen" (2006). Soon after, he recorded an abridged audio book of the Doctor Who novel The Art of Destruction by Stephen Cole.