Too many questions here - does informed consent even apply here? They aren't providing a medical intervention, they aren't medical staff, and the caller is not

Too many questions here - does informed consent even apply here? They aren't providing a medical intervention, they aren't medical staff, and the caller is not their patient - even if it does, is it reasonable to assume that someone who is imminently about to commit suicide lacks capacity? Other than by legally available mechanisms? Probably. - if you want to kill yourself why would you make it clear to someone over the phone first? - is consent even necessary for such action by emergency services? I don't think so.