Man there are a lot of mobile deals in the UK. Just want a pair of pre-pay sims for a month. Won't be a huge abount of voice/data use, but there will be some international txting. Voice would probably be under 100 mins, and probably under 50. It would be good to have one phone we could tether to a laptop for data.
Generally known online as OpenMedia, now working for Red Hat APAC a Technology Evangelist and Product Manager. Still playing with MythTV and digital media on the side.
You generally won't find a fantastic deal with the main providers for a month only access. Most seem to only provide their top up bonus' based upon previous months expenditure/top-up. Lebera do a decent international sim for free at the moment, and their all over london.
You could then pick up a vodafone sim or similar for their data plan addons as Lebara don't do data... Certainly on O2 and Vodafone in the UK, pay as you go sims are about 1 pound per minute for international calls.
Hi relation of ours has just come back from 6 weeks in the UK. They used a Orange "Camel " prepaid sim for calling and texting with no problems. This has the advantage of cheap calling back to NZ. Not sure about data though as they didn't use any.