Nuns' Chorus - Morriston Orpheus Choir with Rebecca Evans

Over 30 years ago I bought a compilation double cassette of Male Voice Choir songs. I digitised a few of the tracks, of which this has always been my favourite. And for ages I've been looking for a top quality digital recording of it for sale. If any Morriston followers know of one please shout!
I love this version because of the male choir, but especially for the performance by Rebecca Evans, now a CBE. She has such a natural voice. Many other sopranos sound shrill or like they have a plum in their mouth. Not this lady. There's a wonderful glissando near the end, and the closing harmony is simply divine.