So NTL are going to compensate you when you are leaving anyway?
NTL may be rubbish and appear stupid at most things, but I would think they'd only offer compensation to people who are actually staying.
It would be like you taking your 2 year old TV back to the manufacturer telling them it's a whole heap of rubbish and I'm changing makes, can you compensate me for having to change makes? I don't think so.