Yes, I can see him behind the murder. Sitting up in their Scottish Tower planning the world.
Di was Lady Diana Spencer before her marriage so there is some sort of peerage.
She was a direct descendant of Stuart King Charles II. Her father was (Edward) John Spencer.
She was a member of the Aristocracy. Though referred to as a commoner, She was Lady Diana. The Stuart King of Scots.
Recall that Mary Queen of Scots was killed by her English cousin. Not that big on the royal connections.
Anyway, she was unofficial royalty I guess. Also a badly needed improvement to the gene pool. I think they track and make sure to get an infusion of the right new blood from time to time.