Just a bit of advice with the TST if anyone is worried. My son was deferred at his initial selection as he didnt get enough on his TST to get his preferred role. I think he got 16 at the time. He was a borderline C student and only passed his GCSE on his 3rd attempt. I know not everyone can afford it, but as he had had to wait I think 6 weeks to resit it, in between that time we went to a tutor and they basically went through every area in the link above. And when he went back he got something like 30 I think. So if you just work on those topics and you should be fine.can Anybody tell me what the technical Selection Test Is Like. Like how many Question is on the test.