"despite his dictatorial insistence that we somehow sing our own."
I suppose if you repeat an inaccuracy often enough it MIGHT eventually be accepted – as you have, I am sure, read numerous times, Singers Club policy not MacColl's dictatorial insistence – read Peggy's letter on the Living Tradition website'

you wrote to SO'B, Jim. Not perhaps for me to intervene in your correspondence with him, or to purport to know better than Peggy — tho it seems to be generally agreed here that she got the dates wrong in that letter of hers. But I repeat what I wrote on the inlay to my record Butter&Cheese&All [Brewhouse 8904] in the note to Red·Apple·Juice: that Isla Cameron often insisted on singing it, in an American accent, at the end of her set, explicitly to wind Ewan up, winking roguishly at him each time as if to say "Here's what I think of your old 'got to sing in own tradition' rule!" I remember his once shaking his head sorrowfully at her at the end of one such rendition & saying "A flogging for you, Madam: 50 lashes at the gangway!" I don't care what anybody sez — it WAS, SO, Ewan's rule: I remember his frequently articulating it at B&B sessions at the Louise, which I attended regularly — I can even be clearly descried, sitting literally at Ewan's and Bert's feet, in one of the pix in Journeyman..