Ok thanks Steve - Sam had his hands on it at one time as well. Maybe Richard's copy as those two were always swapping records back in the day.
I assume the original plan was to release it once demand built up, but for whatever reason that never happened.
Unrelated but there is an interesting Evelyn Thomas track that Andy Dyson has from 76 - US release, and not related to "Weakspot", "Doomsday" etc. On a small label.