[1] Born in Kidderminster, Routh attended Malvern College and Harrow School before serving in the Royal Naval Volunteer Reserve (1945–48).
[3] Late works included The Well Tempered Pianist, 24 preludes for piano (2009), performed and recorded by Charles Matthews, and the Symphony No 3 (2010–12), which incorporates and develops material from some of his previous compositions.
[3] A funeral service at St Peter's Church, Hammersmith, was followed by committal at Mortlake Crematorium.
[5] With some colleagues from the Royal Academy, Routh began organising informal performances of new music during the 1950s.
A notable example was one of the earliest concerts of electronic music by British composers to be held in Britain, featuring the music of Tristram Cary, Delia Derbyshire, George Newson, Daphne Oram and Peter Zinovieff, at the Queen Elizabeth Hall on 15 January 1968.