Hey, Sam,
    Strange indeed. I also do not have a physical copy, but they do seem to give Paul Brady credit for the arrangement in their videos of it.

As far as the tale goes -
    In the lyrics someone helpfully typed up on Youtube Blue Clicky, the first verse is:

"Det var jag och min halvbror, Sven-Erik Lundin
vi tog bussen till Boden i midsommartid
I slips och kostym och med flaska brännvin
För vi skulle på dansen på kvällen
När så bussen den stanna i Svartbjörsbyn
Klev det på en ung flicka med nyskrubbad hy
Och tre militärer med ögon av bly
och knappar som glänste i kvällen"

    I see phrases such as "My half brother, Sven-Erik Lundin," (line 1) and "Three Soldiers" (line 7), so there's some similarity there to Arthur McBride, However, I also note "Spain," "Fascist," and "Communist" appear quite a bit in later verses.

    I ran bits of it through Google Translate, of some usefulness early on, but it says the final verse begins:

"And Sven-Erik took the snus box and dreamed to
So the scraping chess got stuck
and then we took one where to neck a herring"

Not sure what to make of that!
~Kristoffer