to setup permission for other people to have access to the account, get your mum (or dad whoever is the account holder) to write to ntl giving you permission to access the account and make sure that you know the security word on it as well.
The data protection act binds ntl which is why they are careful about it... cannot give any information to anyone apart from the named account holder. Once they have permission in writing, the account holder can grant anyone they chose access to the account.
hth
