uswitch website gave some very good offers, much better price than anywhere else I could find.
Ended up getting £40 back in cashback from Quidco, just verified in the last couple of days. Actually worked out really well as I couldn't find same deal direct on affordablemobiles website as I could via uswitch, which just linked to the affordablemobiles site.
Anyway I went direct to the website, added the deal to my basket and then loaded quidco, went via uswitch to the website and it was still in my basket. Extra £40.