If you can't live without data access, even when you are travelling, we have some good news. Virgin Media's Wi-Fi service on London Underground has just gone live.King's Cross and Warren Street Tube stations were the first locations to go live, with Oxford Circus and Green Park Tube stations set to go into operation today (8 June), followed by Victoria and Euston on Saturday. Up to 80 Tube stations across the capital will be connected by the end of July and 120 stations are expected to be live by the end of 2012. The Mayor of London, Boris Johnson, said: 'We need to ensure London is able to cement its position as Europe's leading digital city. Our partnership with Virgin Media to make Wi-Fi available on Tube platforms will be of tremendous benefit as building world class connectivity is critical to supporting new businesses and the jobs they create, especially in the high-tech and creative sectors.'The service is free (initially at least) and will offer up additional services geared to the city, such as up-to-the-minute TfL travel information, daily recommendations from Time Out, exclusive playlists from Spotify and the latest trailers and red carpet gossip from MyMovies.Net.Virgin Media CEO Neil Berkett said: 'This is a truly historic moment as we connect millions of Tube passengers to the wonderful world of the internet for the first time ever. Our plans for getting London Underground online were very ambitious from the start and, in less than just three months, we've launched a major new service, making London one of the world's leading connected cities. By putting the power of Virgin Media's next generation fibre optic network in the hands of Londoners and visitors, we're able to showcase our great capital and celebrate a momentous summer.'To use the new free Wi-Fi service for now, London Underground passengers just need to connect to the service and register their email address. After the summer, the service is likely to stay free for customers of Virgin Media and 'selected networks', but will be pay-as-you-go for others. So make the most of it now.