//Mally does your son want to get "clean" if so then the NHS can help with a few days in a clinic and some prescription drugs ongoing//
Addiction cannot be treated with a few days in a clinic and a few prescription drugs!
Mally, like others here, I cant offer much (if anything) in way of advice but you got my empathy.
Im still fighting my own addiction (alcohol) and know what Ive put others through but the demon is my own to defeat as is your son's.
I wish you all the best.