Gerry you are a star! The song , Once A Jolly Franco, is a great find even though it is not complete. I have not come across a song before which is specifically about non-intervention. I am running a Mudcat perma thread which I started some time ago which you might have seen: it aims to build an archive of 'Songs In English About The Spanish Civil War'.LINK HERE
In that thread, in my initial post, I have put an alphabetical song list which operates as an index with links to relevent posts to be found within that thread. I could copy and paste your song from this thread to the other one but I like to make it clear where the credit lies so would you make a post to the bottom of that thread which explains where you found the song and then add the lyrics? I will then put the song in the index and make a link to that post.

The information which you dug out about the singing of songs after the end of the SCW is also very interesting, particularly with regard to Tom Lehrer. I have a Topic index in the other thread in which there is a link to the section which provides links to the section called 'Other Mudcat Threads Dealing With Spanish Civil War Songs' and I shall make a link there to this whole Australia thread.I shall also add a note to the section about Tom Lehrer's song The Folk Song Army, which I will credit to you.

Thanks again for the effort you have put in to this.

Regards, Geoff