Most of Sumsion's chamber and orchestral works were written earlier in his career and are unpublished or out of print; however a Piano Trio, the orchestral pieces "Overture, In the Cotswolds" and "Idyll, At Valley Green", and the Cello Sonata have all had public performances, the first three at various Three Choirs Festivals. David Lloyd-Jones and the Royal Ballet Sinfonia have recorded an attractive work for strings called "A Mountain Tune" ('English String Miniatures'/White Line/2003), which Sumsion originally wrote for cello and piano.