▁pieces ▁d ating ▁from ▁his ▁last ▁de cade ▁of ▁life . ▁ ▁Works ▁such ▁as ▁the ▁Magn ific at ▁and ▁N unc ▁dim itt is ▁in ▁G ▁major , ▁the ▁Pre ces ▁and ▁Res p ons es , ▁and ▁the ▁anth em ▁They ▁that ▁go ▁down ▁to ▁the ▁sea ▁in ▁ships ▁have ▁entered ▁the ▁standard ▁re per toire ▁of ▁Ang lic an ▁church ▁music . ▁A ▁new ▁disc ▁of ▁S ums ion ' s ▁ch oral ▁music ▁featuring ▁the ▁E cc les ium ▁Ch oir ▁( Ph il ip ▁Stop ford , ▁director ) ▁was ▁released ▁in ▁ 2 0 0 7 ▁as ▁No . ▁ 9 ▁in ▁Pri ory ' s ▁British ▁Church ▁Compos ers ▁Series . ▁S ums ion ' s ▁most ▁significant ▁work ▁for ▁organ ▁is ▁the ▁challeng ing ▁Introduction ▁and ▁Th eme , ▁which ▁has ▁been ▁recorded ▁by ▁Donald ▁H unt ▁( am ong ▁others ) ▁for ▁the ▁Hel ios ▁label . ▁ ▁Most ▁of ▁S ums ion ' s ▁chamber ▁and ▁orch est ral ▁works ▁were ▁written ▁earlier ▁in ▁his ▁career ▁and ▁are ▁un pub lished ▁or ▁out ▁of ▁print ; ▁however ▁a ▁P iano ▁T rio , ▁the ▁orch est ral ▁pieces ▁O vert ure , ▁In ▁the ▁C ots w olds ▁and ▁I dy ll , ▁At ▁Valley ▁Green , ▁and ▁the ▁C ello ▁Son ata ▁have ▁all ▁had ▁public ▁performances , ▁the ▁first ▁three ▁at ▁various ▁Three ▁Ch oir s ▁Fest iv als . ▁David ▁Lloyd - J ones ▁and ▁the ▁Royal ▁Bal let ▁S