"The original take may have been on Topic in England"
It was, it was my first time hearing of it too.
It was a 10" album of Isla and MacColl, entitled 'Still I Love Him'.
Most tracks from it (minus her version of 'Geordie') were made available as a free download a couple of years ago - might be still lurking out there somewhere.
For me, the verse in Rumncoke's version gives the song an edge most of the more up-tempo and somewhat misogynist ones sadly lack; wish I could remember where I first came across it - maybe in Isla's - must dig it out.

"The storm it is raging his boat isn't in
No-one can tell me what's happened to him"

Jim Carroll