as I learnt in maths a few years ago. I noticed one gets problems when trying to access/post to a thread that is being posted to/accessed by someone else at the same time. Your first post has the same timestamp as the post made by Legolas, that may be why there seemed to be no response at first.
If you're in an NTL area you wont be able to have Telewest as there aren't enough customers to go round as it is. They certainly don't want to lay two fibre optic networks past the same houses as they are both as broke as each other.
NTL use the BT telephone wires when you change to their service. They only lay cables when you have their TV package installed. The BB cable uses the same cable as TV, hence the option of connecting via cable modem or set top box.
So i would assume, from loopyloo's question, that he/she has only got NTL telephone and not NTL cable TV.