Well, there's one difference! I now log in to the selfcare.blueyonder.co.uk site to deal with email addresses/broadband upgrades. Although the email/PWP functionality seems to be broken!
Trying to add email addresses gives; You have reached or exceeded your limit of 15 mailboxes.
Editing forwards/auto responders sends you off to
http://webmail.staging.mailtest.ntlworld.com/ - which I can't help feeling is incorrect..
It also doesn't seem keen on you editing the main username/password!