Bakerloo line extension London has no immediate rail or tube links: the nearest stations are , , , and . Before the Baker Street and Waterloo Railway (now the Bakerloo line) opened between Baker Street and Elephant & Castle in 1906, several alternative schemes were proposed for extending the line at both ends. One failed scheme, the New Cross & Waterloo Railway Bill of 1898, had proposed the construction of a line as far south as , but it was not considered by parliament before it was dropped. The possibility of building a line through Camberwell first emerged in 1913, when the Lord
Bakerloo line at Warwick Avenue station showed "Camberwell" as a destination until the 1990s. One oddity is that, almost from its opening until 1917, the Bakerloo operated with the polarity of the conductor rails reversed, the outside rail negative and the centre rail positive. This came about because the Bakerloo shared a power source with the District Railway. On the Bakerloo, the outside conductor rail tended to leak to the tunnel wall, whereas on the District Railway, the centre rail shared a similar problem. The solution was to reverse the polarity on the Bakerloo line, so that the negative rail leaked on