Arnold Rimmer Song, by Chris Barrie (as Arnold Rimmer)
This is a bit of an interesting play. To the best of my knowledge this song was never made available as a stand-alone by the BBC or covered by anyone else, so the name is a bit of a conjecture. The most popular name seems to be "Arnold Rimmer Song", but I've also seen it as "Rimmer Song" and "Rimmer Munchkin Song". I think that for legal reasons the Munchkin name can be ruled out. I was able to find it at Soundcloud as "Arnold Rimmer Song" so I'm going with this.
https://soundcloud.com/schrodingers/...song-red-dwarf