Have searched around for the best PAYG recently and have now got a new sim from http://www.asda-mobile.com/
8p a minute across networks and 4p a text...I dont know if you can beat that...
They use the Vodaphone network...
what is yur useage? i ask because i think o2 simplicity is a great deal if you use a lot, and although it's "contract" it is on a month by month basis - ie you only need to give 30 day notice if it dosent suit if for example you would regularly use 300 mins, it woks out at less than 5 p a minute if you were just phoning. It has 600 texts too (if you were just texting it would work out at 2.5p per text) when you combine both for 14.69 a month it seems very good to me. of course this benefit would reply on you using 300 mins/600 texts a month http://shop.o2.co.uk/sim-only-simplicity?cm_mm c_o=7BBTkwCjCmbF5kbgbfYCjCH0zgfCjCBn%2520lbF5k bgbfY