I interpreted it as a peak vs off-peak thing You might be able to buy either a peak or off-peak paper ticket, but you have to choose. If you make the wrong de

I interpreted it as a peak vs off-peak thing You might be able to buy either a peak or off-peak paper ticket, but you have to choose. If you make the wrong decision, you'll end up paying £3.90 too much. With contactless, you literally can't make the wrong decision (you pay the fare at the moment you're riding the train, so it can charge you accordingly)