Thanks for the feedback, all. It's nice to see at least a little dialogue going on in the forum. Doesn't happen much these days.
I remain addicted to Fangradio... each day still tends to pop up something unusual! I am a bit confused with the "Italian Plastic home demo" though. I am pretty sure it is Neil at home by himself. Given it is a Paul song and Neil shares no writing credit, it just struck me as interesting that Neil would have his own home demo of it.
Maybe that was a bit of the Crowded House dynamic though - if Paul had a song, he would present it to Neil. If Neil liked it, he would play around with it via home demos and then pass that demo back to Paul before moving onto the band demo...