You can switch to the line rental saver online or call BT on 0800 100 400 to switch to line rental saver.
Having done that I then decided to then ring my broadband provider and tell them I was going to switch to BT, who have an unlimited download package free for 6 months... the result... a new router with the latest 'N' wireless standard and a 50% reduction in my monthly internet cost... that's another £57 over the year!
So that's almost £114 saved for the sake of 15 minutes on the phone, and both 0800 numbers too!
How canny is that!
The Canny Nana