Its frustrating alright, like so many more in the country. I know a few who have got into the 18month postgrad after 2-3 goes at it, the thing at the moment is that it may not keep going ahead with the lack of jobs, as it was created initially to fill a shortage of positions.
But from a parental point of view, the best you can do is prepare her to be patient and relentless with it and that she will get there in the end. It is rare these days for people to leave college and walk into their dream job. It usually takes time and stepping stones and working the system.
So some other things she could be working on too towards that end would be to get a diploma in Irish, I think some of the unis do a nightcourse in it and I think (not at all sure) that with that she may not have the do the irish exam if she went to the UK, she should definately work on her oral irish for the interview, that is the breaking point of most in the interview, get a few days experience in schools, coach summer camps and get some basic sports coaching qualifications if she has any inclination in that area. If she didnt get in for September she could look at using the year to get an Special Needs asst cert &/or a TEFL cert. Id imagine they would all stand to her.
You should also check out, as regards training in the UK, if the bursary still exists. I think teaching students get a £5/6000 bursary over there.
So best of luck to her and do emphasize patience and working strategically. She is perfectly right to chase the dream, life is too short and Fianna Fail wont be in power for ever (hopefully)