Speaking of participation
Dear Intelligence Overlords:
The late addition of Prince Harry to lunch should rejected by your team. They intend to use him as a scapegoat for any negative leaks (and if he is in there, there will be leaks, probably Charles).
They are not "fans". If Harry the halfwit prince IS in there, Charles can leak whatever he wants and the media will automatically blame harry..who loves Obama and hates you. His wife hates you and it's only going to be worse since Brexit won the day. Harry is in deep shit anyway, best to tell them to make him stay home. This bullshit with a fake kid, surrogate, lying etc, all due to blackmail? Keep your distance–unless you've brought some bargaining power for the possible DOEs.
Take care shaking hands with people wearing gloves.
And on a personal note, please review the dismal performance of the Obamas at the state dinner. Know that the endless gaffs they made were ignored by the media. If any one of your troop makes a single protocol error it will be world news.
Easy does it and keep the hell away from Harry.