Working for me. I had to reboot the router.

Thanks, Sounddude for persisting with getting this working.

could someone confirm the settings for me?

I was told that i didn't have ipv6 enabled on my router but it is..

there are the settings I have .. [fritz 7490]

dauckland: Not familiar with your hardware but trying to map your setting onto my router I’d say you need to select first option for global address. I think all assignments happen over ipv4 first.
I left prefix hint off, i think that comes from Ocron.
See if that works

That did it, cheers mate :o) 

jamesrt: @sounddude

I’ve noticed my previously working IPv6 in Porirua/Wellington now seems to be a non-working IPv6...

Any known reason?

jamesrt: 
Never mind; posting this seems to have magically made the ipv6 banner appear back on Geekzone. Go figure.

Modern Webbrowers have this feature called "Happy Eyeballs". Basically what it does it send the ipv6 packet, and 500ms later sends the ipv4 packet. First packet to come backs wins the session.

It then caches from there.

I had at times had to quit (just not close it) Chrome to get the ipv6 geekzone logo back.

https://en.wikipedia.org/wiki/Happy_Eyeballs