Attacks on London
Provides information on the attacks on London's metro system in July 2005, as well as on the current security situation on the network.
http://www.tfl.gov.uk/tube/londonattacks/

BBC.co.uk
London Tube map.
http://www.bbc.co.uk/london/travel/downloads/tube_map.html

British Transport Police
The BTP works to keep the nation's rail network crime free.
http://www.btp.police.uk/

Describe Online
Text guide to London Underground stations.
http://www.describe-online.com/lul/londonundergroundstations.htm

Going Underground.net
An unofficial but quirky, funny and informative website about the London Underground. It includes a good section on Tube etiquette.
http://solo2.abac.com/themole/

iPod Subway Maps.com
Download maps of major subway systems around the globe to your Apple iPod.
http://www.ipodsubwaymaps.com/

JStott.me.uk
London Underground's Tube map superimposed on a Google map of London.
http://www.jstott.me.uk/googlemaps/tubemap/

London Underground
The website of the metro operator. Use it to plan all aspects of your journey on the network.
http://tube.tfl.gov.uk/

London's Transport Museum
Discover London's urban transport history at this fascinating museum at Covent Garden.
http://www.ltmuseum.co.uk/

Metronet Rail
Metronet is responsible for upgrading, replacing and maintaining two-thirds of London Underground's infrastructure including its trains, stations, signalling, track, tunnels and bridges.
http://www.metronetrail.com/

Shortwalk.blog.co.uk
Download a map of the London Underground detailing walking distances between stations, so you can work out when it is quicker to simply walk.
http://shortwalk.blog.co.uk/

Transport for London
A map of the London Underground network.
http://map.tfl.gov.uk/map.asp

Transport for London - Docklands Light Railway
Tells you all you need to know about the light rail system serving the Docklands business district and parts of the East End.
http://www.tfl.gov.uk/dlr/

Tube Guru
Use this interactive map of the London Underground to find attractions nearby stations on the network.
http://tube.tfl.gov.uk/guru/index.asp

Tubeplanner.com
Unofficial guide to London's metro system.
http://www.tubeplanner.com/

UK Public Transport Information
Covering all travel by rail, air, coach, bus, ferry, metro and tram within the UK, this site is the definitive index to timetables, fares, ticket types, passenger facilities and lots more.
http://www.pti.org.uk/