I did some backings for Keith Duke tunes when I was doing As One Voice: the Next Generation last year. Aldo in Italy uses Keith Duke chants to accompany prayer and asked for one of Cadfan’s Blessing. You can hear it done properly here. I did my best to work it out on my faithful ukelele and transfer it to BIAB.
My backing has none of the subtlety that the human player provides, but for what it’s worth this is my approximate version. I’d fade it out before the end as there seems to be a couple of stray notes that shouldn’t be there and it is too long anyway.