The Oyster card is a payment method for public transport in London and some surrounding areas. A standard Oyster card is a blue credit-card-sized stored-value contactless smart card. It is promoted by
A damaged Oyster card, revealing the microchip in the lower right corner and the antenna running around the perimeter of the card
Oyster card vending machine, installed at London Bridge station in December 2006. All machines of this design have been phased out.
Oyster card readers on London Underground ticket barriers at Canary Wharf
Oyster card top-up machine at IFS Cloud Royal Docks
The London Underground is a rapid transit system serving Greater London and some parts of the adjacent home counties of Buckinghamshire, Essex, and Hertfordshire in England. It is part of the network
Oyster card
…It is promoted by Transport for London (TfL) and can be used as part of London's integrated transport network on travel modes including London Buses, London Underground, the Docklands Light Railway (DLR), London Overground, Tramlink, some river boat services, and most of the National Rail services within the London…
The name "Tube" comes from the circular tube-like tunnels through which the small-profile (deep tube) trains travel. Northern line 1995 Stock train approaching Hendon Central.
A sub-surface Metropolitan line S8 Stock train at Amersham
Sign on wall beside Marylebone Road beyond station entrance
The Metropolitan Railway opened in 1863 using GWR broad-gauge locomotives.