When did postcodes start in UK?

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Tags

1. #other
2. #digit
3. #ernest
4. #however
5. #trials
6. #norwich
7. #nationwide
8. #throughout
9. #codes
10. #first
11. #finally
12. #maples
13. #until
14. #postmaster
15. #today
16. #resulted
17. #postal
18. #which
19. #gradual
20. #1960s
21. #rollout
22. #completed
23. #trialled
24. #general
25. #followed