I worked as a file manager at the recruiting centre for a short bit, handling reserve files. There is a consent form for parents to sign which gives permission for anyone under the age
of 18 to do the fitness test. I think I even recall the paper was pink in colour. Sometimes it was part of the package when you apply, but I do know that you need to bring that
piece of paper signed to the fitness test, or have one of your parents present to sign consent or you will not be able to do the test and you will have to reschedule it.
Depending on how booked the gym is for PT tests, you may be put on the back burner and may have to wait a period of time before it can be taken again.
With the number of trades being closed, and positions being limited you might not want to take your chances, because if you have to reschedule it, you might have to wait
again for another offer, and there is no telling how long that might be!