American trains are much the same in pricing. I think it is to discourage random travel, so the railroad knows how many are going, and can reasonably extrapolate how many are coming back, on a given day. This allows them to have enough rolling stock on hand to handle demand. Although British trains do often confuse me, by what I see on YouTube. There is a Great Western Railroad, and a First Great Western as well. LMS trains seem to make a warbling noise. And there seem to be a lot of diesels, even where there is catenary. And Crewe seems to have many a train. Lovely rail system, though.