I don’t have Tim’s album to hand right now to check the credits but Neil sang some verses on the original, which likely means it was co-written.
Thanks, Jaffa - I don't remember seeing Neil credited on Tim's version of "Always Never Know," but it's possible he/they decided to leave his name off it. I did check the wikipedia for and Neil's not credited. Maybe Tim changed it enough to warrant a credit, or maybe it was just their choice. I'd love to know the behind the scenes story. Hmmm.