I'd be happy with things like booking offices and cash payments being retained if the increasingly tiny number of people wanting to use them are willing to pay extra to fund them, as I'm not.
Or perhaps those paying for small amounts by card could chip in themselves for their card processing fees, rather than expecting those of us paying by cash to help fund those? There was a good reason that until very recently most places had a minimum spend for card transactions. Are you certain that the costs of handling cash outweighs all these card processing fees added together? These things cut both ways.
Alternatively we could just continue to let people do what they feel most comfortable with (including ticket offices, paper tickets, paying in cash, paper timetables, and return tickets), and stop trying to make these 'savings' that are miniscule compared to the entire railway budget, but that also dissuade people from using the railways and probably end up costing more than they save.
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What do the National Rail Conditions of Carriage state someone **should** do when faced with this scenario?
In addition, what do the National Rail Conditions of Carriage state someone **should** do when the TVM at their origin station does sell their desired ticket but does not accept their chosen method of payment?
To the former, I believe it is silent on the subject of what to do if your preferred ticket is unavailable on a TVM, which is very unhelpful.
To the latter, 6.1.3.2 refers to 'preferred method of payment (card or cash)', whereas 6.1.1. for penalty fare stations refers to 'only available method of payment (card or cash)' - which means for a penalty fare station it is entirely unclear whether you are required to use a card or not if the machine only takes cards, and you have a card on you, but prefer to use cash. Which is also very unhelpful.