I understand that if you were to meet Prince George or Princess Charlotte or Prince Louis in public or at a private event, according to tradition, you’d have to bow/curtsey to them and address them as Your Royal Highness and then Sir/Ma’am.
But, how deep would you personally decide to bow/curtsey to them? Close to the floor or just bobbing your head?
Also, would you just call them Sir and Ma’am or include HRH?