Composer, author, and conductor who had a successful freelance music career from the 1930s to the 1970s.
She received her first musical training at the St. Paul's Girls' School.
She authored a successful introductory music theory book "An ABC on Music" in 1963.
She was the only child of 19th century composer Gustav Holst.
She was Benjamin Britten's musical assistant during the first part of the 1950s.