Listening to Bunny Wailer's 'Roots Radics Rockers Reggae', from 1987:
I kept thinking: hmm, where have I heard that melody before? Somewhere, long ago, in a very different form. And then it hit me: Stiff Little Fingers!
The original is from 1981. So the 1987 Bunny Wailer song, performed by a genuine rootsman from Jamaica, is actually a cover (albeit hugely transformed) of a six-year-old song by a Belfast punk band.