One of the reasons why people often want their day in court is to show that its not always clear cut and that their actions were genuine.
Yes, that is a reason for some people to enter that arena. But even if the outcome for you
lesleypallmall does include that recognition, your sense of satisfaction will be private, short lived, and in the greater scheme of your life, probably quite trivial. That's what was in my mind when I told you that there are some principles worth taking a risk for, but this isn't one of them. I'm sure you are concerned about several more important matters that need to be reformed, even at the risk of individuals incurring costs in Court (think of end-of-life-care, exploitation of the vulnerable, investment fund fraud as examples).
Anyway, if
lesleypallmall, you did want to choose an issue to which you would risk being a martyr, and if that
was to do with railway ticketing, then I'm sure that ComUtoR and I and others on here would offer you real practical support. But I would also hope that when choosing a cause, that you wouldn't choose one where the issues before the Court was a couple of pounds outstanding for a journey during the 'peak' with an off-peak ticket, and where the Company had already offered you an opportunity to pay that minor difference, and where through neglect, distraction or more serious diversions, you did not actually participate in the dialogue offered to you, because those failures to engage simply muddy the waters of the crucial issue, and muddy it so very badly that it becomes 'lost' in that silent passage of time while the costs escalated and you said and did nothing.
If you really want to make that point of principle than might be noticed in the future, then here's what you must do: Do it again, get proper written statements, and then go straight for a prosecution; when you lose, Appeal. That might make a difference. And might justify you feeling rather pleased with yourself for some time!
If the outcome was that the OP was found guilty, as expected, but it was found that the passenger should be informed and that policy should be added/amended so that a passenger is ASKED if they wanted off peak or not then that is a victory in itself.
But that is not an option for you,
lesleypallmall. This will be heard in a Magistrates Court, where the decision has absolutely no bearing on any other person now or in the future. Yet another reason for focussing on the facts of the matter and a sense of perspective - not any wider principle.
But as I, najaB, bb21 and others have said: please don't.