[Mick Fisher]

Migrate your email usage to gmail.
I have no idea what the current problem is with your ntlworld account, but it is likely to be just the latest issue in what seems to be the never ending saga of problems that regularly beset the said service.
If you dislike using a web interface it is a simple matter to have gmail forward your mails to your client of choice, there is even a pop feature to explore. Unlike some other webmail services there is no charge to use these features.