Imogen Holst (1907-1984(, the only child of Gustav Holst, was a composer and arranger of folksongs, writer on music, conductor, and administrator. She also acted as music assistant to Benjamin Britten, of whom she became a friend and close associate. She subsequently continued as Artistic Director of the Aldeburgh Festival until 1977, when she retired to devote more time to preparing a thematic catalogue of her father's music.