1) What modem do you have?
2) Are you experiencing any problems other than websites?
3) If yes, have you reported them to ntl?
4) If yes, what did they say?
5)

to the site.
[Edit]
http://homepage.ntlworld.com/robin.d...ps/lights.html
Try changing your proxy:
http://homepage.ntlworld.com/robin.d....html#sidestep