30-day SIM only contract
5GB of data
500 mins / 5000 texts
£10 per month
iD network (uses Three network too)
I can only get this to work via Techradar for some reason, you don't need a voucher though. Seems really cheap seeing as it's only a 30-day deal rather than a 12 month lock-in.
£10 a month is nuts seeing as a lot places are more expensive for 5GB SIMs on a 12-month deal. Here you can leave after any 30 day period.