Seven years later the MK&NKJR built an extension from a new junction station at New Beckenham to Croydon (Addiscombe Road) which again was operated by the SER.

[3] In 1878 a connection was added a quarter-mile north of the station to serve the Crystal Palace District Gas Company (which had been established on the site in 1854).

Electrification saw more houses built in the Lower Sydenham area which also picked up some passengers from the large London County Council estate at Bellingham.

[8] After World War II and following nationalisation on 1 January 1948, the station fell under the auspices of British Railways Southern Region.

In the 1950s the line was still busy with freight traffic with four early morning seaborne coal trains routed from Erith to Brockley Lane (reverse) and then to the gas works.

[14] Following privatisation of British Rail on 1 April 1994 the infrastructure at Lower Sydenham station became the responsibility of Railtrack whilst a business unit operated the train services.

On 13 October 1996 operation of the passenger services passed to Connex South Eastern who were originally due to run the franchise until 2011.

Following a number of accidents and financial issues Railtrack plc was sold to Network Rail on 3 October 2002 who became responsible for the infrastructure.