(b Shrewsbury, 1935).
Eng. musicologist. Univ. posts at Nottingham 1964–9, Cardiff 1969–75; reader at King's Coll., London, from 1975, prof. of mus. theory 1982–96. Expert in analysis of works by Schoenberg, Britten, Webern, and other 20th cent. composers. Author of study of Britten and Tippett and Musical Composition in the Twentieth Century (2000).