John has had a long career in theatre, television and film. It stretches back at least to 1956, when he made his film debut as a thirteen-year-old in A Town Called Alice. In the 1960s was in the television series Fact and Fiction and No Hiding Place. He was also in Sir Laurence Olivier's Academy Award-winning adaptation of Othello. In the 1970s, he guested on several television shows, including: Special Branch; Doctor on the Go; and Agony, with Maureen Lipman. In the 1980s, he featured in the film The Grey Fox and guested on The Professionals, Metal Mickey, No. 73 and Shine on Harvey Moon. It was also in the 1980s when took on his one and only recurring television role, in That Beryl Marson!.
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