How to Address the Queen
Upon being introduced to The Queen, and on leaving, a bow or curtsy is made.
The bow is an inclination of the head, not from the waist.
The curtsy should be a discreet but dignified bob.
In conversation, address The Queen as 'Your Majesty', and subsequently 'Ma'am' (to rhyme with Pam).
When conversing with The Queen, substitute 'Your Majesty' for 'you'.
When introducing another person to The Queen, simply state the name of the person to be introduced:
'May I present Mr John Smith, Your Majesty?'