Can I upgrade from economy to business class British Airways?

Related questions

1. What is British Airways cancellation policy?
2. Do British Airways allow name changes?
3. Can I use my Avios to book a flight for someone else?
4. Can I use Avios to upgrade someone else?
5. Can you cancel a BA holiday?
6. Do you get refund if you miss your flight?
7. Which country owns British Airways?
8. How many Boeing 747 does British Airways have?
9. Does British Airways have live chat?
10. How many Avios will I earn BA?

Tags

1. #class
2. #business
3. #onboard
4. #lucia
5. #upgrade
6. #since
7. #people
8. #flight
9. #sweet
10. #upgrades
11. #small
12. #economy
13. #overbook
14. #popular
15. #often
16. #premium
17. #cabin
18. #having
19. #which
20. #flights
21. #apart
22. #status