5. Black tea sounds like black coffee when you have a foreign accent. #fail.
4. Don't go against the flow of traffic in the tube station. Nasty glares will ensue.
3. When crossing the street, ensure you are on the side farthest away from oncoming traffic, just to be on the safe side!
1. You have to flag down the waitress to get your bill. I think I need to get better at flagging or just start making my estimates for lunch 15 minutes longer!