Looks like Tesco Mobile have a new deal starting today, their £30per month sim only is reduced to £20 per month.
Could be £17per month if youre using it with an Android Phone aa you can take advantage of their Tesco Mobile Xtras app and save £3per month. Extra benefits are Clubcard points and Bill capping!
12 Month contract save £120 over the term or £156 with Android + Xtras!!