For those who want to go Sim Only - I think these are decent 
Obviously it depends on your usage, but I think they're good.
I'm now deciding on which Sim Only contract to get, currently stuck between:
Vodaphone - 12 months - £10.50 a month (You're saving £5, ends after Sept 30th)
300 minutes
500 mb + 750mb bt openzone
unlimited texts
Thee - 12 months - £6.90 a month
200 minutes
5000 texts
500mb
Three - 12 months - £12.90 a month
200 minutes
5000 texts
All you can eat data
Money is rather tight, so at the moment, I'm edging towards the vodaphone contract.
Obviously it depends on your usage, but I think they're good.
I'm now deciding on which Sim Only contract to get, currently stuck between:
Vodaphone - 12 months - £10.50 a month (You're saving £5, ends after Sept 30th)
300 minutes
500 mb + 750mb bt openzone
unlimited texts
Thee - 12 months - £6.90 a month
200 minutes
5000 texts
500mb
Three - 12 months - £12.90 a month
200 minutes
5000 texts
All you can eat data
Money is rather tight, so at the moment, I'm edging towards the vodaphone contract.