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The London Underground and Docklands Light Railway (DLR) metro systems of London, England uses a mix of paper and electronic smart-card ticketing.

London Underground and Docklands Light Railway use Transport for London's Travelcard zones to calculate fares, including fares on the Underground only. Travelcard Zone 1 is the most central, encompassing an area mainly bounded by the London Terminals and the Circle line, while Travelcard Zone 6 is the most outlying zone within the Greater London boundaries. It includes London Heathrow Airport. All of Greater London is covered by zones 1 to 6.

Tickets including zone 1 are usually more expensive than those involving only outer zones. The most popular destinations and most interchange stations are in zone 1, meaning that most journeys over similar distances will cost the same.

A few stations in the north east of the network, on the Central line, outside Greater London (in the Epping Forest district) are in zones 4, 5 and 6. In the north west of the network, on the Metropolitan line, zones 7, 8 and 9 (formerly A - D) cover stations outside Greater London including Amersham and Chesham in Buckinghamshire. Unlike the lower numbered zones, the ancillary zones 7-9 do not encircle the capital. Some stations are in two consecutive zones: For example, Vauxhall is in Zones 1 and 2. Ten stations in east London, many in the London Borough of Newham area, are in both zone 2 and 3: Abbey Rd, Bromley-by-Bow, Canning Town, East India, Pudding Mill Lane, Star Lane, Stratford, Stratford High Street, Stratford International and West Ham. This creates the situation where two consecutive stations on a radial route are in both zones - West Ham and Bromley by Bow; Stratford and Pudding Mill Lane; Canning Town and East India.

A traveller a two-zone station can, in effect, 'save' a zone and perhaps therefore pay a cheaper fare. For example, travelling to West Ham from any zone 2 station is a single zone journey, but so is travelling there from any zone 3 station.

American transportation system company Cubic Transportation Systems, known in the UK as Westinghouse Cubic Ltd until April 1997, has manufactured all of London Underground's ticket machines since 1987. Tickets are sold from various types of self-service machines; London Underground progressively closed all its station ticket offices in 2015-16. The name for the system as installed from 1987 is "UTS" (Underground Ticketing System), though this system has been enhanced and extended recently, most notably since 1998 under the Prestige initiative, where Oyster smartcards were introduced.

The following tickets are/were available from London Underground, Docklands Light Railway and Transport for London ticket agents for use on the Underground and Docklands Light Railway:

Detailed information on tickets and pricing is available from the Transport for London website.

There are also a number of tickets, issued by National Rail and its agents, valid for travel on London Underground and DLR:

The fare structure for paper single tickets was simplified in January 2006. Fares for single paper tickets have been set deliberately high in order to encourage users to use either Travelcards or Oyster pre-pay fares, which are substantially lower (by up to £2.50 per journey) than paper tickets.

Return tickets are sold at twice the price of a single ticket. A Travelcard is often cheaper than a return ticket and will automatically be provided by ticket machines and ticket office staff if it is cheaper than the return fare.

Daily, seven-day, monthly and annual Travelcards are also available, allowing unlimited rides in two or more zones on the London Underground and most other forms of public transport in London, including most National Rail services, buses, Tramlink and Docklands Light Railway, but not the Emirates Air Line (cable car) cross-Thames service. Travelcards are also available for 'odd periods' of between one month and a year at some retailers. Most regular travellers use Travelcards, and they are usually better value for money than single tickets for anyone making multiple daily journeys or using multiple forms of public transport (train/tube, tube/bus, etc.). Any period travelcard is valid at any time of day, any day of the week.

Day Travelcards are valid at any time on any day, although they are usually only sold Monday-Friday before 9:30am, while cheaper Off-Peak Travelcards are only valid for use on trains & London Underground services after 9:30am on weekdays (excluding Bank Holidays) but any time on weekends & holidays. Newsagents and other designated "Ticket Stop" shops can no longer sell any form of paper tickets and now only offer Oyster facilities; one day paper Bus Passes can be obtained from ticket vending machines at some Bus Stops in Central London. Both Peak and Off-Peak Day Travelcards are valid on all journeys started before 04:30 on the day after the date of issue.

The number and combination of zones is restricted depending the type of travelcard. Travelcards for only one zone are not sold.

† Oyster travelcards for the north-west Zones 7, 8, 9, Watford Junction, Hertford East or Shenfield (denoted as Zone 10, 11 or 12 respectively on Oyster cards) must include at least zones 4-6 and any other contiguous zones, i.e. 5+7, 8+9 etc. are not available for purchase.

In 2003, Transport for London launched the Oyster card. It is a proximity card, which on buses, trams and on the Underground allows a traveller to touch the card on one of the yellow readers positioned on the automatic entrance and exit faregates rather than feeding it through a card ticket reader.

Unlike card tickets, the Oyster card is not disposable, and value - either 'pay as you go' balance or Travelcards - can be added to it at computerised ticket machines and at ticket offices. Where pay as you go credit is used, the cost of each journey is deducted from a stored balance. As of October 2005, weekly, monthly and annual Travelcards issued by London Underground or directly by Transport for London are only available on Oyster cards.

The fare structure is now designed to encourage the use of Oyster cards. Daily Travelcards are not available on Oyster, but a system called 'Capping' ensures that on each day of use no more than the equivalent Travelcard price is deducted. Prior to January 2010 the Oyster cap was 50p less than a Travelcard, but now the cap for Oyster and Travelcard is the same. The balance can be automatically topped up with funds from a credit or debit card when the balance becomes low, a feature known as 'auto top-up'. Tickets and pay as you go credit can be purchased via a website or over the telephone.

The Oyster card system is designed to eliminate the need to purchase tickets at the station for most users. Following the implementation of the technology London Underground reduced the number of staff working in ticket offices.

Contactless Visa, Maestro, MasterCard and American Express debit and credit bank cards,^[3] as well as contactless enabled smartphones and smartwatches using Apple Pay^[4] and Android Pay^[5] are accepted for travel on London Underground, London Overground, Docklands Light Rail, most National Rail, London Tramlink and Bus services.

Operation of the system is exactly the same as the Oyster smartcard; customers should touch their card on the validation devices (entry/exit gates, passenger validators) at the start and again at the end of their journey to ensure the correct fare is paid. Only adult, non-discount, "Pay As You Go" fares are available with Contactless payment cards. Travelcards may not be loaded onto a Contactless payment card as they may be with Oyster.

Unlike Pay As You Go on Oyster (where the stored value held on the card is adjusted as the passenger touches their card as they enter/exit stations or board buses), transactions made with Contactless payment cards are processed by a central processing system. The total charge of all travel accrued throughout a day is settled overnight, meaning that a customer will see one transaction for each day in which they have travelled on their credit card or bank statement. Daily travel charges are settled directly against the customer's debit or credit card account; no "topping up" is required.

Like Oyster, Contactless implements daily capping, whereby the customer pays no more than the price of an equivalent daily Travelcard. Unlike Oyster, Contactless also offers "Monday-Sunday Capping", whereby the combination of products that gives the "best value" is selected (from a range of single fares, extension fares, daily and weekly Travelcards) to ensure that the customer never pays more than is necessary for their travel. The customer does not have to know their travel plans in advance. Monday-Sunday Capping is distinct from an Oyster 7-day Travelcard in that the latter may be purchased on any day of the week, whereas Monday-Sunday Capping "lapses" at the start of the travel day on Monday.

More information is available from the Transport for London website.

In addition to the automatic and staffed faregates at stations, the Underground also operates on a proof-of-payment system. The network is sometimes patrolled by the uniformed staff who mainly stay at the faregates, and very occasionally by plainclothes fare inspectors equipped with hand-held Oyster card readers. Passengers travelling without a ticket valid for their entire journey are sometimes required to pay an £80 penalty fare or face prosecution for fare evasion. Oyster pre-pay users who have failed to 'touch in' at the start of their journey are also considered to be travelling without a valid ticket and are liable to a penalty fare if caught; otherwise they are charged the maximum fare upon touching out at the destination station.

Touts at stations can often be seen attempting to resell used Day Travelcards that they have been given by passengers who no longer need them. Transport for London strongly discourage this, officially stating that Travelcards are 'non-transferable' and thus invalid if resold. Underground staff and inspectors have the authority to confiscate tickets that they know to have been resold and to require a passenger using such a ticket to pay a penalty fare, although this is rare in practice since proving a ticket has been resold can be a difficult and time-consuming process.

In an attempt to reduce the numbers of Travelcards being used by more than one person, an experiment took place at Brixton station in 2002. A box was provided at the station exit into which passengers were encouraged to deposit Travelcards that were no longer required, and for each ticket deposited London Underground made a small donation to local charities for the homeless.

London Underground ticket machines in all stations support the following 17 languages: English, Spanish, French, German, Italian, Japanese, Arabic, Bengali, Chinese, Greek, Gujarati, Hindi, Polish, Punjabi, Tamil, Turkish and Urdu. Prior to 2009, some ticket machines were multilingual; they supported six languages and those machines had English, Spanish, French, German, Italian, and Japanese. The new languages were added as part of the Investment Programme of LU.^[6]

• Oyster Card information and sales site