NTL do 10mb (trialling 20mb in some areas)

They are only offering you 1mb (which is now 2mb) as the STB will not support anything higher.

Been through this with sister when she upgraded to 2mb (now 4mb) a few months back.

They will need to install a standalone modem to allow speed upgrades.

They will try and charge you for the modem, but sister didnt give up and got it all on a free install.

Billing will change to a separate DD.

http://forums.ntlhell.co.uk is a good place to look too