Since you are interested in Harris / Horo: Requiem for the Fallen, here is a list of other items that you may find interesting.
DJAWADI / BRENNAN / TRADITIONAL / SHORE / BARBER / ADES
Voces8 - Enchanted Isle
VOCES8, with Sibéal
[ Decca / CD - released 25/Mar/2019 ]
Featuring music from Radiohead (Pyramid Song), Enya, Lord of the Rings and Game of Thrones. New arrangements of Scottish and Irish melodies sit alongside compositions set to texts by some of the greatest English poets.
Choral Music [Incls 'Summa' & 'Da pacem Domine']
Polyphony, Stephen Layton
[ Hyperion / CD - released 29/Oct/2014 ]
"this one is something special. In part this is because of the choice of repertoire, which mixes the familiar and the less-often heard, and includes two first recordings, and in part it is because of the exquisite sound produced by Polyphony" Gramoph