Reversing UK mobile rail ticketsThe UK has used small credit-card sized tickets to pay for train travel for years and years, since long before I was born — originally the APTIS ticket1, which later got replaced by a slightly easier to read version printed onto the same stock. Nowadays, the industry would very much like you to ditch your paper ticket in favour of a fancy mobile barcode one (or an ITSO smartcard2); not only do the
