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Answers:
probably tmobile for lb29/month:
http://www.t-mobile.co.uk/shop/mobile-ph...
I don't know much give or take a few the UK, but I would deduce the cheapest agency to connect to the internet would be through an access point using wi-fi and not a cell or mobile phone.
I would cogitate you should be capable of find a hot spot to connect to the internet relatively comfortable and next do you database transfers.
There are usually hot spots at café, libraries? I don't know.
You requirement a cellular card, but this is a particularly expensive passageway to connect.