Surprised nobody posted it yet. The SGS2 for effectively £20/month 900 mins 5000 texts 1gb internet (or £3 extra for truly unlimited) or 500 mins for £17, 24 months on 3 network.
I think it's an awesome deal and close to SIM only deals, kinda like getting the phone free.
I'm not sure whether Affordable Mobiles have the stock to cope, but head over to HUKD for th link.