We got accused of being in somebody’s seat in a train from Birmingham. He got on in Wolverhampton. Very aggressive approach, demanding we move. Obvs we didn’t, I knew we were in “our” seats. He then demanded to see our tickets. I just laughed & said no. This seemed to make him more irate. The train was packed with many standing shoulder to shoulder. He stormed off & returned through the crowds with the ticket conductor woman. Lovely lady. Asked to see my tickets, smiling as I produced them. He had a big grin at this point convinced we were moving for him. Conductor lady thanked me & almost laughing asked to see his ticket. His grin got even bigger & slimier when she confirmed they were his seats. It changed dramatically when she followed up with “Unfortunately you’re on the wrong train, but don’t worry we’ll be in Crewe shortly where you’ll be able to buy a return return ticket to Wolverhampton where you’ll be able to try & change your tickets to a later train” There were audible laughs along the carriage & waves when he got off.