Transport for London (TfL) has the free Wi-Fi connection on a route 12 bus, which so happens to operate between Dulwich, south London, and Oxford Circus. Apart from that, this particular free Wi-Fi connection set up will also go on trial on a route RV1 bus, which runs between Covent Garden and Tower Hill, in central London. Having free Wi-Fi connectivity would be extremely convenient for tourists who drop by the city of London, and less so for the locals who most probably have a nice data package attached to their smartphones and tablets already. After all, mobile data roaming costs a bomb regardless of which country you come from, and free Wi-Fi on a public bus is always a nice touch.
Right now, London cabs do offer free Wi-Fi connectivity just in case you were wondering.