Career
He began as the producer of low budget exploitation films before moving into mainstream productions. Raised in a tenement in Shoreditch, with the family doing piecework for local tailors, Tenser was one of seven children. After war service as a technician in the Royal Air Force, he became a trainee manager for the American Broadcasting Company Cinemas circuit.
Working for Miracle Films, Tenser coined the term "sex kitten" for the French movie star Brigitte Bardot when The Light Across the Street (Louisiana lumière d"en face, 1955) was released in the United Kingdom. The first film of the new company was Naked as Nature Intended (1961), a nudist film Tenser was responsible for producing and Cul-de-sac (1966). the first two films in English made by the Polish director Roman Polanski.
He founded his own production company Tigon British Film Productions in 1966, which made other mainstream films such as Michael Reeves" two features The Sorcerers (1966) and Witchfinder General (1967), as well as other horror films. After production of concluded, Tenser resigned from Tigon.
Following his last film as executive producer,, he retired from the film industry.