What is informal discipline? Code Red? He will not be court martialled. He will be dealt with summarily at unit level by his CO who can award 21 days and forfeiture of pay.
There goes his LSGC. Yes, amusing to watch but what does it say to the public about the standards of discipline and responsibility in his regiment and the UK armed forces? He has broken the code and has no honour! He'll regret his idiocy when he gets to MCTC.