Brit12, it's not really a case of being in the
top 1% to get through, as much as I'd like to say it is
As has been mentioned heaps of times on this forum, you either have it or you don't. You can do all the preparation in the world to advance through the selection process and get on a course, but if you aren't right for the job you won't get through the training.
There have been plenty of people posting here that wanted to be controllers more than anything in the world, and they didn't get selected despite all their preparations. Then there are people in the job that saw the ad and thought they'd give it a try, having no prior knowledge of what it entailed.