You board the train and find a compartment all to yourself. The ticket inspector walks through and he stamps your ticket. You then stare blankly out of the window for a while before falling asleep. Eventually the train arrives at York and you disembark onto the platform. Over the footbridge you can see another train, the sleeper service to Fort William in North Western Scotland. You could get on this train without buying a ticket (its risky but hey, who cares?), or you could leave the station and go into York itself.
Which would you rather do?
Train                                                    York