O2 offering free WiFi around London's busiest streets
 

O2 is making good on its promise to coat the busiest parts of London in free WiFi. Between now and the end of July, seven locations including Oxford Street, Regent Street, Exhibition Road, Leicester and Piccadilly Squares will offer unfettered access -- even if you don't subscribe to O2's cellphone network. There's no word on if the network will remain free forever, but given the painful time we spent crouching in Starbucks doorways on recent trips to New York and Paris, we hope the company does the right thing for the sake of harassed visitors to the capital.

http://www.engadget.com/2012/07/25/o2-london-wifi/