What are London zones 1 6?

Related questions

1. How do oysters produce pearls?
2. What are the odds of finding a pearl in an oyster?
3. Is Oyster card refundable?
4. Do oysters feel pain when making pearls?
5. Why is the Oyster card called oyster?
6. Do Oyster cards expire?
7. Can you use your phone as an Oyster card?
8. Is my oyster?
9. Does London Pass include Oyster card?
10. Do oysters have pearls?

Tags

1. #national
2. #covers
3. #rings
4. #around
5. #assigned
6. #zones
7. #light
8. #underground
9. #london
10. #stations
11. #docklands
12. #central
13. #within
14. #overground
15. #railway
16. #concentric