Great deal on a Sim Only tariff from Three. Only appears to be available if you follow the link from TopCashBack.
£12/month for 8Gb including Roaming and Tethering (for the full 8Gb)
12 Month contract
12*12 = 144 - 55TCB = £89 = effectively just under £7.50/month.
Seems to be a limited time offer for this week only.