What terminal does Heathrow Express leave from?

Related questions

1. Is Heathrow Express free?
2. What's the earliest you can arrive for a flight?
3. Does Heathrow shut at night?
4. Do you really need to be at the airport 2 hours early?
5. Can I stay in the airport overnight?
6. What happened to Terminal 1 at Heathrow?
7. How many hours before can I enter airport?
8. Does Heathrow Express go to Terminal 3?
9. What to do if you have an overnight layover?
10. Can I go to the airport the night before?

Tags

1. #heathrow
2. #trains
3. #travel
4. #minutes
5. #departures
6. #terminals
7. #transfer
8. #paddington
9. #terminal
10. #every
11. #total
12. #london