The station was originally opened by the London and Greenwich Railway as a local service. It subsequently served the London and Croydon Railway, the London and Brighton Railway and the South Eastern Railway, thus becoming an important London terminus. It was rebuilt in 1849 and again in 1864 to provide more services and increase capacity. Local services from London Bridge began to be electrified in the beginning of the 20th century, and had spread to national routes by the 1930s. The station was extensively rebuilt by British Rail during the 1970s, along with a comprehensive re-signalling scheme and track alignment. It was further redeveloped in the 2010s to better accommodate the Thameslink route which provides a connection to Gatwick Airport, Luton Airport and Crossrail.