Came across this deal on the CarphoneWarehouse website.
Unlimited Texts & Calls
3GB Of Data
for £26.50 per month with a £79.99 upfront cost.
However, after ringing CPW they offer £20 off the upfront cost as well as any accessory for the phone for free, up to the value of £20.
Works out to be over the 24 month period, factoring in the upfront cost, £696.