If you land at Heathrow you can take the Heathrow Express to London Paddington Station. From there you can either take the underground or a taxi to the hotel. We would recommend taking a taxi to the hotel (or that area) due to the train strikes that may be happening and we are not sure at this point how the underground will be affected.
You do not need to tip people in England (although you can if you like). We pay a pretty good minimum wage so tipping isn't expected :-)
Formal attire (suits with tie, dresses/gowns)
Our venue is inside the National Theatre. Make your way to the main reception/box office of National Theatre, also named The Sackler Pavilion and is located on the Southbank. There will be an elevator with signs to lead you to the 3rd floor.