Much of the city is already covered with a Wi-Fi network, but the underground system remains without access. If the test works well, the system will be expanded throughout the rest of the underground.
"Kulveer Ranger, the Mayor of London's Transport advisor welcomed it.
'An ever growing commuter populace has been clamouring to be able to check their e-mails and browse the net whilst on the go.
This is an important step towards seeing how this could be achieved and is part of the Mayor's ambition to examine the way in which we can use technology to adapt the city's transport system to meet the need of those using it,' he said."