Why is it called Barclays Premier League?

Related questions

1. Which London club has won the most trophies?
2. Who has scored the most hat tricks between Ronaldo and Messi?
3. Do Barclays still sponsor the Premier League?
4. Who won the Golden Glove for best goalkeeper?
5. Who is sponsored by Coke?
6. What is the longest Premier League winning streak?
7. Who scored the quickest goal ever?

Tags

1. #known
2. #league
3. #became
4. #premier
5. #premiership
6. #changed
7. #barclays
8. #sponsorship
9. #season
10. #until
11. #barclaycard
12. #title
13. #before
14. #competition
15. #carling
16. #campaign