How do I contact the Royal Household?

How do I contact someone in the Royal Household?

HOW DO I CONTACT ROYAL HOUSEHOLDS AND DEPARTMENTS?

The postal address for The Queen, members of the Royal Family and departments of the Royal Household is:
Buckingham Palace
London SW1A 1AA.

The postal address for The Prince of Wales's Household Office is:
Clarence House
St. James's Palace
London SW1A 1BA.

E-mail correspondence is not yet available from the Royal Households.