As joe has stated repeatedly, the train company has a duty of care, even to the annoying p**sed up little runt. The conductor failed to apply this.
Of course the train company has a duty of care, then again, so does everyone else travelling on the trains. We expect everyone to abide by the law, buy a ticket and not be an a-hole. Yet, this young scrote failed to abide by these rules and got what he deserved. The conductor and big guy should be rewarded, not reprimanded. If only the rest of this country would stand up against other chancers.