Trained at the Royal Academy of Music, Muir first worked in the movies on the quota quickies of the 1930s. His big break came when Alexander Korda signed him as musical director on Catalina de Rusia (1934). He went on to conduct Sir William Walton's score for Enrique V (1944) and Hamlet (1948), as a part of a long, distinguished career as one of the most distinguished composers and musical directors in British cinema.
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