Why is Ireland not Schengen?

Related questions

1. Does Ireland come in Schengen?
2. Is UK visa valid for Ireland?
3. How much is the visa fee?
4. Is Ireland going to join Schengen?
5. Is Ireland a Schengen country?
6. Why is the UK not in Schengen?
7. Do you need a passport to fly from UK to Dublin?
8. Does the UK include Ireland?
9. How long does Irish visa take?
10. Why is Ireland not in Schengen?

Tags

1. #frontier
2. #common
3. #britain
4. #because
5. #controls
6. #interest
7. #persons
8. #situation
9. #ended
10. #addition
11. #impose
12. #would
13. #schengen
14. #travel
15. #where
16. #between
17. #entry
18. #ireland
19. #agreement
20. #travelling