TalkMobile offers its SIMple plan on a six month contract for as little as £7 a month. The cost of the plan stands at £12 a month but you do get a £30 cashback which cuts the effective cost of the monthly outlay to only £8. Note that you only get the cashback once during the contract.
The package is actually a rather enticing one. You get 600 minutes, 3,000 texts and 750MB data. Heavier users can opt for a £9.67 plan that offers 1500 minutes, 3000 texts and 1GB of data.
TalkMobile uses Vodafone as backend provider which means that you should be able to slot the SIM in a phone locked on that network.
The company also offers a cheap £2.50 one-month plan that offers 25 minutes and 50 texts, another one that offers 100 minutes, 100 texts and 100MB data for £5.11. Those looking for longer commitments can check out the £8 plans which offer either 100 minutes, 200 texts and 1GB data or 300 minutes, 3000 texts but no data.