(15 Apr 2018, 1:48 pm)Andreos1 wrote To prove your point about the technology, I accidentally picked the wrong ticket out of my wallet at one point on the second day.
It didn't work. The machine pinged an error and I was forced to use the correct ticket.
I've done the same with the QR code tickets. It is brilliant how they speed up boarding too. Certainly a lot quicker than the old Go n Save cards were, or even the Key card for that matter. Perhaps comparable with the speed Oyster cards are read.