He was born in Croydon, Surrey, on 19 December 1927, the son of a probation officer. He was educated at Southend Grammar School, which he left aged 17 to join the army. He rose to the rank of Captain. He spent several years working for an international trading company. However, his interest in acting soon took priority. He was trained at RADA and he made his first professional appearance as a member of the Old Vic company, before joining Joan Littlewood’s Theatre Workshop at the Theatre Royal, Stratford East in 1958. The Workshop’s musical Fings Ain’t Wot They Used T’Be became a hit and Booth, who played its most pungent character, looked poised for stardom. Producer Irving Allen signed Booth to an exclusive contract with Warwick Films. The sixties, and especially the early sixties, represented the most active period of Booth’s movie career, with Zulu being the film for which he is best remembered. Joseph E. Levine put him under contract. He will also be remembered for playing the part of Kenny Ames, a pornography baron living in enforced exile in Spain, in series 2 of Auf Wiedersehen, Pet in 1985. Though many observers expected Booth to become a major star, his acting career stalled and nearly died. In interviews, Booth was surprisingly forthcoming about the reasons for his professional difficulties. These included his appearance in the flop stage musical Twang! in 1965, the flop film The Secret of My Success opposite such popular actresses as Honor Blackman and Shirley Jones, his alcoholism, his unaggressive approach to selling himself, his lack of connections, and his own failure to work hard because everything came so easily to him at first. Booth also turned down the lead role of Alfie. By 1974 he was bankrupt, heavily in debt, and was forced to return to the stage.

When no one would offer Booth an acting job, he tried his hand at screenwriting and found a market for his services in Hollywood. From the mid-seventies to sometime in the nineties, Booth lived in southern California and worked primarily as a screenwriter, making occasional film or TV appearances, including a cameo appearance in the second series of Twin Peaks (1990). In later life Booth moved back to England. He never retired. He married Paula Delaney in 1960 and they had two sons and two daughters. He died in Hadleigh, Essex on 11 August 2005 aged 77. His last film – Keeping Mum – was dedicated to his memory.