Re: Plusnet Party
Hmmm, I've got IPv6 with Plusnet (via John Lewis Superfast Fibre). The Zyxel router actually wouldn't let me disable it either which turned into a lot of messing around last year with pre-configured VPN apps to try and stop them leaking. Fortunately the apps have improved greatly since then.
Plusnet have failed to provide me with just about everything it should have in the way of service, not even half of the advertised speed which is an ongoing issue, but I definitely have IPv6.