Buzzcocks Moving Away From The Pulesbeat 12″ promo

Found one of these rarities yesterday, a Buzzcocks Moving Away From The Pulsebeat 12″ one sided promo 1978 United Artists.

I have often wondered why they manufactured this? It was never a single, wasn’t a track that was likely to pick up and radio and was never used for competition prizes.

If anyone has an answer to the above please let me know.