And some notes from the last mentioned album:
[1975:] [A group round Ewan MacColl, Alan Lomax, A. L. Lloyd:] one side of their only single for Decca. [...] The story goes that MacColl was inspired by the popularity of Negro chaingang songs among British skifflers to produce something with more of a British accent. Terms like 'screw' for warder and 'snout' for tobacco were unknown then. (Karl Dallas, notes 'The Electric Muse')
Unfortunately, I find the lyrics almost impossible to make out as it's a fairly fast song.