Sorry for the vague title.
I have a close friend who is estranged from their family. They have a number of health conditions, none of which are currently life-limiting or life-threatening. Of late, friend has been unwell and is due to go back for some more tests - the word 'anomaly' was mentioned, so friend is understandably concerned, as am I.
Friend lives alone, some 50 miles from me, so we maintain close contact by phone or social media.
My friend has asked if they can put me as 'next of kin' on hospital/doctor records etc. Has said that if they predecease me, they'd like me to deal with all the formalities (although we're hoping that all this will be a long way off).
Does my friend need to have a POA in place naming me, or is there something less formal that they can do? They have no desire to have their family involved in their current health scare situation or later in life, at the point of their death.