The London Metro, also known as the Tube, consists of 270 stations and 11 metro lines. Each line has its own name and color: Bakerloo (brown), Central (red), Circle (yellow), District (green), Hammersmith & City (pink), Jubilee (gray), Metropolitan (purple), Northern (black), Piccadilly (dark blue), Victoria (light blue) and Waterloo & City (turquoise). The metro network in London is very huge and has many branch routes. Many stations provide access to suburban railway or rapid transit lines. Total lines length amounts to 402 km. Working hours: from 5 a.m. till 1 a.m. on week days and from 7 a.m. till 1 a.m. at the weekend.
The subway network uses London's zonal fare system to calculate fares. A ticket will cost you about 4,90 – 8,50 GBP (it depends on the zone and the time of travel, i.e. it is more expensive at rush hours). It may be used for a single journey in any means of public railway transportation. There are daily tickets that cost 6,60 – 17,20 GBP and weekly 1passes which price varies from 33,10 to 85,70 GBP and depends on the subway zone. Moreover, you may use a pre-payment smartcard – Oyster – to pay for transportation services. The card is free of charge. It can be loaded with Travel Cards and used across the London transport system. Besides, it features a 30% discount for all journeys. The Travel Card will be a good choice for tourists. There are daily cards that cost 12,30 GBP, weekly ones at the cost of 33 GBP and more, as well as monthly cards for 126,80 GBP or more.
You may get a ticket or a pass at ticket offices or TVMs. Be advised, some TMVs accept coins, notes and credit cards while the other ones accept either coins or cards. Passing through the faregate you have to insert the ticket into it or tag the card to the yellow-circle scanner on the gate. Leaving the station you have to follow the same procedure as the fare is credited at the end of the ride. The system is patrolled by both uniformed and plain-clothes fare inspectors.