A few places with free wi-fi in the UK are,
Starbucks, McDonalds, most High street cafes / bars.
If you buy a new microsim while in the UK I recommend getting one from 3 mobile. They have very good 3G coverage and currently have a better deal than most. Other places that sell microsims are, O2, Orange, Vodaphone & many others.
Sent from Tim's iPad
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