Psych nurses should have special training, as they are dealing with very vulnerable people.
Where i live, the nhs is in a piss poor state. My friend has a god daughter, Katy, who took an overdose and was taken to A&E. She didn't even see a psych nurse, or anyone in that field. She was dealt with by a junior doc, who hardly spoke a word of English and was given an appointment for psych evaluation some two days later.
That is really shit. She is ok now. This was a while back.