best known for providing the voices of Zen, Orac and Slave, computers on the science fiction TV show Blake's 7.
Tuddenham began his career in weekly repertory and entertained troops during the Second World War as a member of the Army's "Stars in Battledress". Back home, he won a part in Ivor Novello's The Dancing Years and, following stints in West End revues and farces, worked with Noël Coward in Ace of Clubs.
Moving into radio, he acted in the long-running series Mrs Dale's Diary and Waggoner's Walk.
Tuddenham also starred in the TV sitcom Backs to the Land and later made numerous other occasional or one-off appearances in shows such as Only Fools and Horses, One Foot in the Grave, The Onedin Line, Quiller, Bergerac, Tales of the Unexpected and The Bill.
He also provided voices for the Doctor Who stories The Ark in Space, The Masque of Mandragora and Time and the Rani. Later he returned to tape the audio drama spin-offs Occam's Razor and Death's Head.