Ian

Evidently there's room for disagreement on the distinction. There was another case recently about whether or not it was a criminal offence to tighten the tourniquet for someone while they injected themselves with an overdose. Taking an illegal substance (as opposed to possessing it) has never been criminalised; committing suicide used to be a crime, but isn't any more. The judgment in that case proceeded on the basis that what the deceased was doing was lawful.