Bump22 – I’m so relieved for you that your son has turned up. That must have been a horrible experience for him. When my son disappeared at the end of August he was psychotic and I wonder if I could have got him sectioned which may have got him on a treatment path. Maybe it’s possible to argue that your son is a danger to himself, I think you said that he is a regular at a&e because of od-ing . You’d have to know exactly where he is to do this.
There seems to be no option in the uk to keep people safe while you wait for them to come to their senses.