How to contact the Queen
You can write to Her Majesty at the following address:
Her Majesty The Queen
Buckingham Palace
London SW1A 1AA
If you wish to write a formal letter, you can open with 'Madam' and close the letter with the form 'I have the honour to be, Madam, Your Majesty's humble and obedient servant'.
This traditional approach is by no means obligatory. You should feel free to write in whatever style you feel comfortable.
Send Her a Letter