I hate to sow further confusion, but I spoke yesterday to John Foreman (The Broadsheet King) and mentioned this song to him. He was quite certain that it was written by JOHN HORROCKS of the Workers' Music Association. He points out that the WMA published songs properly and established copyright. Shouldn't this mean there is a copy (or more) in the Copyright libraries. Which raises the thought === Who does the Performing Right Society and the Mechanical Copyright Protection Society think wrote it? Has anyone asked them. I don't know about MCPS, but PRS has a computerised index that ought to find a song or an author rapidly.
Apologies for interloping, but I thought the hunt might still be going on. I shall now outerlope. Best regards!