If it stays like this Scotland have qualified as they have 14 points. Greece only have 13. We've got 11, as have Croatia & Ukraine. Northern Ireland could drop below Greece if they lose by more than 2 later.
I read it on the Irish forum earlier. They're all saying if Scotland win then they would need a win and Ukraine-Croatia to be a draw or win by more than 3 goals. I can't be bothered checking all the permutations myself but that's what they're all saying.