I'm with Aldergrove Flight Training and can thoroughly recommend them if you are in N Ireland - good bunch of people and its at an international airport with all the commercial traffic, radio calls, wake turbulence separation etc.
I have had 6 lessons with the intention of getting some experience and applying to the usual sponsorships this year - I may go and do my PPL with the school however if the sponsorships don't work out.
Give them a call.