You cannot win with some punters. When a 313 I'm due to work is replaced by a 377, there is technically no first class. I tell the punters this, but some just won't believe you. I had one guy, after I told him he could sit in first class go, 'no way, you will come in and fine me'. Trying to get some round to the fact that 'no 1 in the timetable, no first class', and if your booked 313 becomes a 377, that means the original train was not timetabled to have first class, therefore, no first class', takes time, but I think I'm getting there.