I had a cassette with this on which just said 'Cleethorpes', it was around 1980. It was a right mish-mosh so it could have been from anywhere, it was being played by Searling. I suspect it was recorded in the late 70's as there were a few "Grapevine" releases in the spot too. Apart from yours, I have only seen the 7" listed once, but it was already sold when I rang about it; so there's at least 2?