Since you are interested in Pärt: Kanon pokajanen, here is a list of other items that you may find interesting.
Tavener: No longer mourn for me & other works for cello
Steven Isserlis (cello) / Philharmonia Orchestra, Trinity Boys Choir, Omer Meir Wellber
[ Hyperion / CD - released 30/Oct/2020 ]
"Steven Isserlis's effective arrangements of two choral pieces for an ensemble of eight cellos frame the disc...the Philharmonia under Omer Meir Wellber are assured advocates." Recording of the Month - BBC Music Award WINNER - Premier Award