Or Osbourne could demand that the Irish govt brings their air tax back up (highly unlikely)
Although that can't happon. Once the Irish Gov meet the EU requirments they are happy and it dosn't matter how they do once they do.
If they had to bring it back to €10. CO would still leave BFS and other airlines would still operate from DUB before BFS.
Although when ROI had €10 tax all flights within Ireland had a reduced rate of €2 if not €3, which should be applied across the UK and not just NI - UK flights.