Eoin,
I have been in the police for six years. However the career break scheme is available to officers who have completed their probationary period (ie after two years service). I am still there. I will work up until I find a flight training school and actuallt start training. I am looking to start before the end of the year.
If you have any other questions, particularly in relation to joining the police and the application process, I am more than happy to advise you with my limited knowledge.
Good luck with both careers!
Steve.