I spent over an hour with a helpful chap at Vurgin Media earlier this week. We de-registered my MacBook Pro and tonight I re-registered it and using my home network was able to access TV Anywhere successfully. Obviously, as you will perceive, this is hardly a test of TVA - watching it at home - but at least I'm halfway there.
We also tried to register my iPad but it sent an error message that it was registered as an overseas device which it wasn't. Anyway I tried to use my iPad tonight to access TVA but the system didn't recognise it even where it said IPad. So I de-registered the IPad and tried to re-register it as an iPad but the system said as I already had made two registrations this month !
So I shall wait patiently until next year to try again with the iPad!