Blessed is known for portraying PC "Fancy" Smith in "Z-Cars", Augustus in the 1976 BBC television production of "I, Claudius", Prince Vultan in "Flash Gordon", Bustopher Jones and Old Deuteronomy in the 1981 original London production of "Cats" at the New London Theatre, Duke Thomas Beaufort of Exeter in Kenneth Branagh's film adaptation of "Henry V", Boss Nass in "" and the voice of Clayton in "Disney's Tarzan".