English composer John Foulds (1880-1939).
In some respects ahead of his time (he started using quarter-tones as early as the 1890s, while some of his later works anticipate Messiaen and Minimalism) Foulds was in others an intensely practical musician. He became a successful composer of light music (his Keltic Lament was once a popular favourite) and wrote many effective theatre scores, notably for his friends Lewis Casson and Sybil Thorndike.