Why is there no Terminal 1 at Heathrow?

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Tags

1. #airways
2. #heathrow
3. #operator
4. #years
5. #flight
6. #terminal
7. #tonight
8. #close
9. #queen
10. #airport
11. #british
12. #departure
13. #passengers
14. #opened
15. #first
16. #hanover
17. #european
18. #doors
19. #after
20. #final