Hi, I'm a current Yls student so I may be able to help you out here. If you get off the train at York then you need to catch the number 4 or the 44. Either way if you're going to the law school you need to get off at the last stop - heslington east.
The interview itself isnt something to lose sleep over. All the academics are nice and they're not trying to catch you out. In mine it was just questions like should public funding be spent on public art or healthcare and whether I thought the law should interfere in private life. Dont research answers to the questions - they seemed to like listening to your thoughts and how you reasoned.
Good luck!