Clive's UndergrounD Line Guides  
   Extensive guide to each of the lines on the Underground. History and other technical information.
   http://www.davros.org/rail/culg/

Down The Tubes  
   A few photos of the London Underground.
   http://www.wakey.com/tubes/

Tubeplanner.com  
   Online tube journey planner for travelling on the London Underground / DLR and Croydon Tramlink. Also features station, tourist and fare guides.
   http://www.tubeplanner.com/

London Railways Net  
   Primarily about London Underground but also information on some of the railway branch lines in East and West London, tourist information and additional information on other tunnels beneath London.
   http://www.londonrailways.net/

History of the Underground  
   Provides details about the 40 disused stations or "ghost" stations on the underground, together with suggestions for their future use.
   http://www.starfury.demon.co.uk/uground/

Carter's Unofficial Guide to the London Underground  
   Seen through the eyes of American Scott Carter. Includes sounds of the tube, history, background of the London Underground's distinctive typeface and photos.
   http://www.geocities.com/CollegePark/3812/index.html

Piccadilly Line  
   An essay about London's Piccadilly Line, one of the city's major underground railway lines.
   http://www.krysstal.com/piccline.html

Tube Journey Planner  
   Finds the quickest route between stations on the London Underground.
   http://www.tjp.uklinux.net/tjp.pl

Suite 101 - Articles on the London Underground  
   Home to a large collection of articles, including a history of Tube posters, advice dating from 1927 regarding passenger behaviour and general travel advice for modern times.
   http://www.suite101.com/welcome.cfm/london_underground

ISawYouToday.com  
   Message board for people who saw someone they liked on the London Underground tube system.
   http://www.isawyoutoday.com/Vegas.htm

Going Underground  
   Humorous but informative with London Underground maps, history of the London Underground and funny experiences on the tube.
   http://www.goingunderground.net

One Stop Short Of Barking  
   A website outlining a book about the tube by Mecca Ibrahim, giving a taste of the driver announcements and entertaining characters to be found in the book.
   http://www.mind-the-gap-book.com/

London Bloggers Tube Map  
   Geographical directory of weblogs, plotting their proximity to given Underground stations. Data also available in RDF.
   http://www.iamcal.com/misc/londonbloggers/

London Underground Railway Society  
   Studies Londons underground railways, past, present and future, including the Post Office Railway, The Docklands Light Railway, and Croydon Tramlink .
   http://www.lurs.org.uk/

Tubeprune  
   An unofficial website for London Underground workers and anyone interested in London Underground. Information on rolling stock and signals plus a driver's diary with many anecdotes.
   http://www.trainweb.org/tubeprune/index.htm

District Dave's London Underground Site  
   Facts and opinions regarding the Tube from a serving District Line Train Operator. Sections on driver training, train equipment and working experiences.
   http://www.trainweb.org/districtdave/

London Underground by Subwayrail  
   The Tube as seen by a Train Operator and former Station Assistant. Selection and training of station staff and drivers, ticket gate error codes and experiences of dealing with passengers.
   http://subwayrail.tripod.com

The Modern London Underground  
   Histories and photo galleries of tube stations, depots and trains.
   http://www.angelfire.com/extreme/transport/index.html

Squarewheels Railways - Richards Railway Page  
   Detailed and illustrated descriptions of London Underground locomotives and rolling stock. Articles on the refurbishment of Mornington Crescent station and the final operational day of 1959 Northern Line stock. Also advice for cyclists using the tube.
   http://www.squarewheels.org.uk/rly/

London Underground Tube Diary  
   A weblog from the webmaster of Going Underground, describing her experiences of the tube and other public transport services. Visitors can add comments.
   http://london-underground.blogspot.com/

The Metadyne Website  
   Detailed articles about several aspects of London Underground operations, including signal cabin details, the evolution of the LT Rule Book, history of the private telephone system and the story of Oxford Circus station - one of the busiest on the network
   http://mysite.wanadoo-members.co.uk/metadyne/

The Transport Forum  
   A discussion forum for LUL, National Rail, DLR and other public transport workers or enthusiasts. Some sections are reserved for transport staff.
   http://billz1064.proboards1.com/index.cgi

Geofftech.co.uk  
   The home page of a tube user who has done the tube challenge - visiting every station on the network in less than a day.
   http://www.geofftech.co.uk/

Nick's Homepage  
   The history of London Underground during World War Two, with station-by-station usage and bomb damage descriptions. Another section deals with how the tube has been portrayed in films and on television.
   http://www.cwgcuser.org.uk/personal/

TubeGroup  
   Homepage for the TubeGroup email discussion group. Users can discuss London Underground, DLR and other inner-London railway matters - in an open non-political atmosphere.
   http://groups.yahoo.com/group/tubegroup/

The Underground Cooling Website  
   Information exchange and resource for cooling systems for underground railways and deep mines. Also covers the related topic of underground thermal energy storage.
   http://www.undergroundcooling.net

Sustainable Cooling Schemes for the London Underground Railway Network  
   A scientific paper describing a possible solution to the problem of heat in tube carriages from the South Bank University School of Engineering Systems and Design. [PDF]
   http://www.cibse.org/pdfs/Cooling.pdf

Cravens Heritage Trains  
   A society dedicated to the preservation of former London Underground trains.
   http://www.simon5596.supanet.com/

Ongar Railway Preservation Society  
   The Epping to Ongar line was part of the Central Line until 1994. ORPS aim to preserve the line and operate it as a heritage railway.
   http://www.john.f.rumble.btinternet.co.uk/History.htm

Historical London Underground Maps  
   London underground maps, from 1907 to the 1960s, of historical and graphical interest.
   http://uk.geocities.com/lhsoicher/undergroundmaps.html

Abandoned Tube Stations  
   Histories and photographs of many of London Underground's disused stations and platforms.
   http://www.pendar.pwp.blueyonder.co.uk/Tube/

Wikipedia Online Encyclopedia: London Underground Articles  
   Contributors discuss diverse aspects of the tube, including wartime usage, expansion plans and safety. Line and station histories are also covered, with links to related articles.
   http://en.wikipedia.org/wiki/London_Underground

HSE Underground Railways Annual Report 2003-2004  
   Report into safety and performance issues on London Underground, including statistics on broken rails and fatalities. [PDF]
   http://www.hse.gov.uk/railways/annualreport0203/underground.pdf

Fare Evasion and Automatic Ticket collection on the London Underground  
   A study into the effectiveness of the tube's UTS ticket gates in preventing fraudulent travel. [PDF]
   http://www.popcenter.org/Library/CrimePrevention/Volume%2001/07clarke.pdf

The Power Cut in London on 28 August 2003  
   A report from the London Assembly’s Public Services Committee into the causes and effects of a major power failure, concentrating on its effect on London Underground services. Several problems are identified, along with recommendations for their resolut [PDF]
   http://www.london.gov.uk/assembly/reports/pubserv/powercut.pdf

Metronet Rail  
   Metronet Rail is responsible for maintaining and upgrading nine of the twelve lines on the London Underground network, and their associated stations. Find details of new trains and plans for upgrading signal and control systems.
   http://www.metronetrail.com/

Infraco Exchange  
   Discussion forum for employees of London Underground and the Infracos - companies involved in maintaining the infrastructure of the Tube.
   http://infraco.proboards42.com/

Tube Challenge  
   Details the rules of the tube challenge, which involves visiting all of the stations on the London Underground network in the quickest possible time. It is recognised by Guinness as an official world record. A history of the challenge is also provided.
   http://www.tubechallenge.com/

Londonstation.com  
   Photographs of London Underground stations. Originally taken in black and white, all the pictures have been coloured artificially.
   http://www.londonstation.com/

Tube Lines  
   Homepage of the company which provides maintenance services for trains and infrastructure on the Jubilee, Northern and Piccadilly lines.
   http://www.tubelines.com/default.html