On our previous cruises, the pax with imminent airline/other transportation needs were disembarked first. I assume those pax that paid much more than we did also disembarked early, as we normally waited for quit a while. I also assume self disembarkers are allowed off first.
On these boards I see self disembarkers are first, and then all I have seen is that the remainder of the pax are allowed off by deck, but I have never seen what, if any, schedule Cunard follows. I would presume Grilles pax would go immediatly after selfers, and then the rest of us. If they do so by deck, do they start at the bottom of the ship, or all the way at the top? This would make a difference as to transportation arrangements.