Peter Denyer
Peter John Denyer was an English actor who played Dennis Dunstable in London Weekend Television's Please Sir!, and its spin-off series The Fenn Street Gang, taking on the role of a teenager when already into his 20s. He also appeared in the film versions of Please Sir! (1971) and Never Mind the Quality, Feel the Width (1973), and the glam rock film Never Too Young to Rock (1976).
Source: Wikipedia
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