I am beginning to think this has not turned out how Harold planned - according to this report KC basically kept the engine running on his chopper and had a quick Hi, bye with Harold and carried on with his plans albeit a few minutes late - no real concessions made other then being a being late to take off nor extended invites.
William being the one to make a statement is also significant in his elevation of role and deputy of the RF
Harold must realise how much out on a limb he is now - no extended invites, no offer of a place to stay for the night, no one else wanting to meet with him and significantly no joint update/statement as sons of the monarch as there would have been if he was still within the inner sanctum of the RF.
He flew how far for a 30 min, probably uninvited, meeting with his dad