This is a stand-to for an incoming competition, one of our most expensive yet.
Later this week we're going to be offering the opportunity to Win £270 Rab Neutrino Pro military down jacket
Visit the thread at that link above and Watch it to be notified as soon as the competition goes live
You're probably better off putting this in the TA forum rather than the Fitness one. However, it's not a case of failing, just a case of "go away and come back in six months once you've addressed these problems".
You seem a bit nervous about the whole affair. Confidence is an important thing in the military. My advice would be to just give it your all on the day. If you do well, job done, if not just chalk it up to experience and go back once you've got yourself in shape.