"The Oyster is a plastic smartcard which can be used for pay-as-you-travel fares as well as for pre-paid passes."We’re experiencing technical issues with our Oyster Card readers this morning where customers are unable to touch in or out," the firm tweeted.    has confirmed that the problem has now been resolved.The card can be used to travel on bus, Tube, tram, Docklands Light Railway, London Overground, TfL Rail and most National Rail services in London. In the meantime, customers can continue to travel across the Tube, bus and rail networks."We’re working on a fix and customers are being allowed to travel across Tube/Bus/Rail networks.The Oyster touch-in and touch-out card readers, which are used across the underground Tube, buses and trams of London, failed to activate — forcing station staff to keep the ticket barriers open for everyone. Public transport in London is normally only free for a brief period overnight on New Year’s Eve, when fares are waived to allow party-goers to get home. We apologise for this disruption.Thousands of commuters in the British capital on Saturday enjoyed unexpected free travel on the city’s transport network, including buses, trains and the underground Tube, after a technical glitch res       Thousands of commuters in the British capital on Saturday enjoyed unexpected free travel on  China cosmetic organizer  Suppliers the city’s transport network, including buses, trains and the underground Tube, after a technical glitch resulted in a collapse of its ticketing system.It is expected to have caused Transport for London (TfL) thousands of pounds in losses