I've created a record in Digital OCean for it, but it's made no difference, so not sure where to go from here. I can't think of anything else at this point.
Ahh, no wait, I might have it. Just a moment. 😆 I've set up a CNAME record for www in 35hz.co.uk.
That according to google, should work.
EDIT: Do you ever get that feeling, when you've worked so long on something, and it finally works, you're not sure if you're imaginging it. I'm having one of those moments.
The /forum/ redirect didn't work, but, quite frankly. I'm not even remotely bothered about it. 😆