Choral and organ music appear most often in Sumsion's output during his Gloucester tenure and retirement, with many choral pieces dating from his last decade of life. Works such as the Magnificat and Nunc dimittis in G major, the Preces and Responses, and the anthem "They that go down to the sea in ships" have entered the standard repertoire of Anglican church music. A new disc of Sumsion's choral music featuring the Ecclesium Choir (Philip Stopford, director) was released in 2007 as No. 9 in Priory's "British Church Composers Series". Sumsion's most significant work for organ is the challenging "Introduction and Theme", which has been recorded by Donald Hunt (among others) for the Helios label.