Most of the Underground network is inaccessible, note the lack of access symbols on the map. http://content.tfl.gov.uk/standard-tube-map.pdf http://content.tfl

Most of the Underground network is inaccessible, note the lack of access symbols on the map. http://content.tfl.gov.uk/standard-tube-map.pdf http://content.tfl.gov.uk/standard-tube-map.pdf Until recently disabled access wasn't really considered. The Docklands Light Railway which started in the late 1980s, and the late 90s Jubilee line extension are the only fully accessible bits on the network.