By his own words Harry has admitted industrial levels of drug abuse; we know he consumed an enormous bag of cannabis in Africa, so much that he forgot what day it was. Cocaine at a shooting party, as well as several lines of cocaine since. Add to that magic mushrooms, which are also Class A.
In effect his money (who I am kidding his father's money) has been channelled down a narcotic supply line to fund other forms of criminality.
If he had been born in Peckham and admitted to this he would be facing a long stretch.
Harry needs to be interviewed under caution and he needs to give up the name of those responsible for supplying him. For far too long a certain sort of public schoolboy, schoolgirl with access to free money has pumped money into the narcotic trade.
When the Civil Police have finished with him the Royal Military Police can then question him about his breach of military discipline. 2 years in Aldershot Glasshouse will teach him some valuable life skills and provide him with a trade when he leaves custody.