Who would I WANT?
Anne & I think she would do it 'as her duty' until George is 18, despite not wanting to.
if for some reason she was unable, then Edward, but I think he would find it all too much.
To me, it doesn't feel right Kate doing it & it DEFINITELY shouldn't be Andrew, B&E & Z & P have no experience. NOT Harry.
I'm uncertain who would, but hopefully we'll never need to find out as it would be awful for Charles & William to both die before George is 18.