Many thanks to the self effacing 'catter who PMd me and has since emailed me both the MacColl recording and the Redpath. I have been working on it and am well on my way to an arrangement.

The MacColl and Redpath versions are almost identical, so clearly one learned from the other or they had a common source. As I remember Jacqui's version although plainly the same tune the timing differed, and just a couple of details (maybe) of the melody. I wonder if this is just the folk process. There were other members of Jacqui's band(s) in the 60s who were much into the research, so maybe, just maybe, there was another source or perhaps the timing got altered when someone got dots collection notes from C# Ho.

Does anyone old enough to remember the era know if MacColl or Redpath researched the song at C#Ho or did it come from somewhere else?   Pest, I was just to young to know first hand and in any event had no interest in trad folk then...