How many Avios do I need to upgrade to business?

Related questions

1. Can I change my British Airways flight?
2. Does British Airways have max 8?
3. Will Avios points expire?
4. Does British Airways offer bereavement fares?
5. Do British Airways allow name changes?
6. Can you cancel a BA holiday?
7. Can you transfer British Airways miles?
8. Can I upgrade from economy to business class British Airways?
9. What is my Avios number British Airways?
10. What happens if you miss a return flight?

Tags

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11. #premium
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15. #class
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17. #would
18. #world
19. #redemption