I have ordered a Samsung tocco lite mobile from tesco for £69.97 (on tesco network). The price is almost same (+/- £10), when compared to other stores / networks.
There is a current offer where you get 1000 points on select mobile purchases above £50. I also had a ecoupon TD-SJSJ (valid till 03/01/10), which adds on another 500 points. So all in all further £15 equivalent savings. In additon you get clubcard points for the phone as well (not sure if its double. Hope this is useful.. Happy Xmas..