Carphone Warehouse Talkmobile network are offering a free sim card on a 6 pounds per month tariff which gives you 50 free any network minutes and 50 free any network texts included. You also get 500 free texts per month to other people on Talkmobile.
It's a rolling 30 day contract and it's only a month's notice to cancel.
However... you get 2 months free... so if you give your notice after 1 month you've had the minutes and calls for nothing! Really good deal, especially if 2 of you have it and text each other!
First deal, hope it's a good one...