In the UK who decides if and which medical examiner performs an autopsy on a dead body?

Novel research: if someone dies unexpectedly who decides if an autopsy is needed and who decides which medical examiner does it? Is it done on a district basis? Is there any way to guarentee a particular medical examiner performs an autopsy?

In the UK who decides if and which medical examiner performs an autopsy on a dead body?
i'm sure its down to whoever is on duty or on call at the time.i dont think you can guarantee who performs it.good luck with the research.hope this helps.

my cat