Hi there,
Make sure that the router you buy is a cable broadband router and not an ADSL router as this will not work with your connection.
You can get one from PC World but I'm sure you'l find cheaper online.
I have this one at the moment:
http://www.amazon.co.uk/Linksys-Ethe...261346&sr=1-51
Very easy to setup.
1. Turn off PC's and turn off NTL cable modem.
2. Still switched off, Connect NTL modem to router and each PC to router.
3. Switch on NTL modem and wait for lights to be steady.
4. Switch on router and wait til lights are steady.
5. Switch on PC's and should work straight away.