I can't find the link quickly tonight but it is one you commented on with regard to continuity of email after switching from DialUp to Broadband.
I am a BT Anytime subscriber & have been concerned about exactly what would happen to my email address if I switched over to the faster service.
You are correct in that the actual email address can be retained BUT with Broadband Basic & Broadband this is only WEBMAIL if you want to continue with POP3 then the upgrade to Premium Mail is required and that costs £1.50 per month.
On the expensive BT Yahoo Broadband - which is expensive POP3 is included.
I have clarified this on BT Premium Cost Help line this afternoon.