> Aside from that, QR codes are yet another form of ticket for National Rail trains, and they work in some stations in London and not others.
Which National Rail stations in London don't accept the barcoded tickets? I'm especially curious to know what happens if you attempt to purchase a barcoded ticket ('E-Ticket' in National Rail parlance) to one of these destinations.
The ticket machines at this station are also the same type as in non-National Rail stations, and they do not let you print pre-booked National Rail train tickets.
In my experience, if you try to book a National Rail ticket to West Ham, it will not offer you the option of a barcoded ticket.
Which National Rail stations in London don't accept the barcoded tickets? I'm especially curious to know what happens if you attempt to purchase a barcoded ticket ('E-Ticket' in National Rail parlance) to one of these destinations.