Him wrote:
In which case I desperately hope he matures a bit quicker and doesn't waste his talent through arrogance and ego.
He deserved punishing.
I don't see a £2.5k fine and getting back in training to be an overly harsh punishment.
It's his own unprofessionalism that has put him in this position, if it's true he has reacted in that way then he really does need to grow up, as DHM has pointed out.
That's just a head up @rse type of response. Easy to say for someone without the talent to be in that position. I suspect would be different view had you been in same.
I am quite sure were you picked up for something at work, and received a reprimand, that your attitude would be different had your work collegue done the same thing and received a slap on the back.
But easy to comment until it happens to you.