Flying business class from Boston to Heathrow then first class on the return flight. I already had to ask about pajamas and slippers etc. that you get on the plane. Didn't know what I could keep and what had to stay behind! Now I'm wondering about the Concorde Room lounge in T5. Are the food and beverages free or do you pay for them? If you sit in the dining area with wait staff do you pay? Do you tip? What about if you book a spa treatment? Do you pay or tip for that? As I said, total newbie but don't want to look like one! Thanks!