19th-century London of the Thames from the City of London westwards experienced a flurry of bridge-building during the 19th century, improving overland communication to South London. At the turn of the 19th century there were only three existing bridges in Central London: Westminster Bridge, Blackfriars Bridge, and the ancient London Bridge. Beyond Westminster, the closest bridge was that of Battersea, three miles upstream from Westminster Bridge. All four were demolished and rebuilt over the course of the century (completed in 1862, 1869, 1831,and 1885 respectively). In addition, a slew of new bridges for road, pedestrian, and railway traffic were built: Southwark Bridge
London Bridge station provided at London Bridge; the first station south of the river was at Borough. King William Street was found to be badly placed owing to a steep incline towards the station from underneath the Thames, which limited its capacity. When the decision was made to extend the C&SLR northwards to Moorgate, a new pair of tunnels was constructed from north of Borough station on a new alignment providing a more convenient route and the opportunity to open a station at London Bridge. The tunnels to King William Street and the station were closed and the extension and London Bridge station