His 1945 opera, Peter Grimes established him as a leading operatic composer, and was followed by other works, such as The Turn of the Screw and Billy Budd.
His early career included collaborations with W. H. Auden, including their Hymn to Saint Cecilia.  His comic opera Gloriana  was written for the coronation of Queen Elizabeth II. His 1945 opera, Peter Grimes established him as a leading operatic composer, and was followed by other works, such as The Turn of the Screw and Billy Budd. His magnum opus was subtitled Variations and Fugue on a Theme of Purcell.  For ten points, identify this British composer of A Young Person's Guide to the Orchestra.
His early career included collaborations with W. H. Auden, including their Hymn to Saint Cecilia.  
Benjamin Britten