the london underground is a public rapid transit system in the united kingdom that serves a large part of greater london and the home counties of essex, hertfordshire and buckinghamshire. it has many former stations, while others were planned but not opened. some stations were closed because of low passenger usage rendering them uneconomical; some became redundant after lines were re-routed or replacements were constructed; and others are no longer served by the underground but remain open to national rail mainline services. many stations were planned as parts of new lines or extensions to existing ones but were later abandoned. some closed station buildings are still standing, converted for other uses or abandoned, while others have been demolished and their sites redeveloped. a number of stations, while still open, have closed platforms or sections, such as the jubilee line platforms at charing cross. the interiors and platforms of a few closed stations are among parts of the london underground available for filming purposes, such as those at aldwych. ==former stations== the following stations were once served by a london underground line or by one of the organisation's predecessor companies,today's london underground is an amalgamation of a number of separate railway companies that were brought together under the common ownership of the london passenger transport board (lptb) in 1933. the current operator, transport for london, is the latest successor of the lptb. but are no longer served. many are permanently closed, but some continue to be served by national rail mainline train operators. {|class="wikitable sortable" width="100%" |- ! width="15%" | station ! width="13%" | line ! width="10%" | closed ! width="16%" | type of closure ! width="16%" | current condition ! class="unsortable" width="30%" | details |- | aldgate east | district |  | station resited | demolished | closed when the current station was opened a short distance to the east to enable the aldgate junction to be rebuilt |- | aldwych | piccadilly |  | station and route closed | building remains and platforms sometimes used for cinematic purposes | terminus of piccadilly line branch line from holborn; closed due to low passenger numbers and cost of replacing lifts |- | aylesbury | [[metropolitan line|metropolita
Disused_London_Underground_stations Lists_of_metro_stations Lists_of_railway_stations_in_London Subterranean_London