Errr, juniors can compete. No one is stopping them compete. I watched a whole JGP of them competing and loved it a whole lot more than the seniors.
In pretty much all the sports I vaguely know of (to be fair said knowledge is invariably vague) there are separate competitions for juniors and seniors, the question (which is yet
again OTT

this thread is resembling a plate of manic alien spaghetti) is at what age. And that is always arbitrary, it was when 15, it is now when 17/
And before anyone thinks I am all in favour of the latter - I simply want to watch and see - remember my man was also one of those who also went senior at 15.