the secret @oystercardtfl #doubletouch #twominute rules you didnt know about the @OysterCardTfL #doubletouch #twominute rules < 2m MAX fare > 2m and < 30m MIN fare > 30m double MAX fare https://tfl.gov.uk/fares/how-to-pay-and-where-to-buy-tickets-and-oyster/pay-as-you-go/touching-in-and-out#on-this-page-4