Fixed! Go to the fix.
Thanks for your post @Donaldo
We've tested your line and we can't see any obvious cause for this but I suspect the issue may be that at the time you reconnected at your new property your account was still set to Unlimited Fibre speeds instead of the Unlimited Fibre Extra that you upgraded to.
This has since gone through so I've manually dropped your connection and if you retest the line you should see an increase in speed.
Let us know if you're still having issues