This is the best deal I have seen on a 18 months contract. There are many good FREE handsets available.
Using wincanton and OPOSO take animal plan RACOON for 18 months, with £35 a month to get 800 minutes.
Select the phone which shows "££'s off monthly bill". I selected Sony Ericsson W910i.
At the checkout you would see the monthly payment reduced to £31.50 (after 10% Employee Discount)
On top of this you would get £10 off your bill every month which reduces the monthly payment to £21.50.
Plus DO NOT FORGET QUIDCO - you get £60.00 for contract phones. Which means, virtually I pay £18.16 a month. (£21.5 for 18 months = £387. minus £60 = £327. Divided by 18 months = £18.16)