The London Underground station lies to the north of the mainline station concourse.It is currently the busiest station on the system with around 76 million using the station (not including interchanging passengers) as of 2007, 60.2 million (including interchanges) using the Victoria Line platforms. There are two ticket halls. The newer hall, closer to the mainline station, serves the Victoria Line; the other, farther north, serves the District and Circle Lines. The ticket halls are connected by a pedestrian passage beneath the Bus station.