Highest ranked on the show
Trying to make some sense of this FAQ. It depends if you mean politically ranked, celebrity ranked (biggest A-lister) or in terms of nobility (if there was no one from the Cabinet a Lord, like Lord Onslow would outrank everyone else unless they have an Archbishop on.)
I think the Leader of the Opposition outranks a member of the Cabinet anyway (I believe most Cabinet roles are equal). There have been several on the show.