Sadly, it's been my job of being involved in every completed suicide in the last decade and many of the attempts. I'm not aware of a single person who has been charged with self-harm. When we do the deep dives and actually go and revisit this, it hasn't been an issue. The number one priority has always been the care of the individual after self-harm. The medical folks will treat the person in confidence. If the chain of command is aware, the person would immediately receive care.
We stopped doing some reinvestigations for self-harm, instead replacing them with a process to make sure that the senior doctor and the chain of command talk to make sure the person is in care.
The default stance of health services will be to care for the individual, and for the chain command the care of the individual has been the number one priority. I have no knowledge or experience speaking to family members, chain of command, colleagues, doctors that this rule has been a factor in people not seeking care.