Had my shot in March last year. Unfortunately, it was my first and only attempt since I was 23 and considered too old to re-apply! Anyway, my point is don't get disheartened if you're rejected first, second , third or fourth time! From what I understand, they really only take people who perservere and bounce back after rejection, time after time again! 'tis true!
Anyway, I'm off to try my luck at Sandhurst now 'cos they like us 'oldies' there (you're not too old until you've reached 26!)
Good luck!