A recent report has stated that the City of London will set-up a wi-fi network for the Square Mile:
'The City of London today announced plans to install a dense and comprehensive wi-fi internet network throughout London's Square Mile financial district. The city has contracted UK wireless provider The Cloud to install and manage the network.
The wi-fi network is expected to go live in the next few months and cover virtually the entire city within six months. The wi-fi equipment will be installed in existing objects such as lamp posts and street signs which are owned by the city. The Cloud will design the network so that any service provider can use the network to provide wireless internet services. The network will also provide data networks for emergency services and city transport authorities.'