From ORAC's link:
where they can lobby for business and contracts
Surely they could requisition an old PM and give him a phone with WhatsApp pre-installed? Job done.
Semi-seriously though, it only really works if the Royals play ball, which they're reportedly not minded to do. Also, given the semi-imminent reshuffle at the top of the regal tree, will Chad have the same pulling power as Brenda for this sort of thing?
As for the design, it looks a little too Boaty McBoatface for my liking, a bit crap compared to your average Oligarch superyacht.
PS Did someone here note that it would need its own defensive systems, just in case? I'd be intrigued to see where they'd place the CIWS (and imagine that going off during a drinks reception!)