Oatcake back a bit before the Spinners, though they might well have felt it necessary to modify the text in a few respects.
I've got in front of me a booklet published by the BBC for the Central Council for School Broadcasting, to accompany a series of programmes for schools in 1947 on the BBC Home Service. I found it up in the attic - we used it in a school I attended.
And there it is, a version of Whip Jamboree, "Somerset Folk-Song, collected and arranged by Cecil J Sharp" - with the chorus:
"Whip jamboree, whip jamboree,
O you long-tailed black man, poke it up behind me,
Whip jamboree, whip jamboree,
O - Jenny get your oat-cake done."
Innocent times... Though, come to think of it, I don't remember us actually singing that one.