I currently study at Trinity, though I applied for Birmingham as well. I really enjoy my course, I am also an electric player who has picked up double in the past few years and though my principal study is double I play both about 50/50. I was planning to audition at leeds if I didn't get in at either trinity or birmingham, you don't have to apply till later because its through UCAS not CUKAS but I am told that it is a good course, if not nearly as good as it was a few years back. I didn't apply at guildhall because if you study Jazz you have to do classical as well but I know some very good players who study there. I don't officially know but I think Leeds is the easiest to get into, royal welsh the second and birmingham the third, not sure about trinity and guildhall.