If I'm understanding Wikipedia correctly the information about the James Black hymn was added in December 2020 by Revjgreaves.
He seems to have made only one Wikipedia entry\edit.
here : https://en.m.wikipedia.org/wiki/Special:MobileDiff/992074358

The Song Company (Sydney) performed Black's His Love Never Failed Me Yet at a concert in May 2021 along with an a cappella version of Jesus Blood Never Failed Me which Bryars arranged specially for them.
https://www.classikon.com/ecstatic-reveries-from-the-song-company/
Neither that review^ nor this https://www.sydneyartsguide.com.au/the-song-company-burden-of-truth-an-extraordinary-achievement/ mention the connection between the two pieces.

It would be great to hear a midi of the James Black hymn.