With 100,000 Tube passengers having used the service in the first four weeks, Virgin Media’s London Underground Wi-Fi service is now available across 41 different stations.

The extension is occurring just before the start of the London 2012 Olympics, enabling millions of commuters to check travel information while keeping friends up to speed with their movements, all while underground. 

The service is free to use throughout the summer, with passengers simply needing to register their email address through the Virgin Media portal to get online. However, the service is limited to stations only, so you will lose your connection once on board a moving train. 

By the end of the year, Wi-Fi is expected to be available in up to 120 London Underground stations, though by that point we’ll need to pay for all aspects of the web bar those partners Virgin Media has cosied up to. These include TFL, Time Out, Spotify and MyMovies.Net which will all provide tailored content through Virgin Media’s portal.

For a full list of what stations where be able to find a Wi-Fi signal, click here.

Let us know when you've tried out Virgin Media's London Underground Wi-Fi service. We want to know what you think.