Princess Diana is *HRH (Her Royal Highness) as she was born royal with direct, genuine, Plantagenet,  Royal Bruce, Stewart, and Tudor blue blood flowing through her veins as well as having earned the right in her exemplary lifetime.  She sincerely cared about people, especially the sick and the underprivileged.  Diana is truly regal.  Being royal, truly royal, comes from the heart and soul, not only from being born royal.  Princess Diana possessed both a beautiful heart and a caring soul. 

Princess Diana is a direct descendent of Robert the Bruce, King of Scots, whose direct line continued through James VI, King of Scots (King James I of Great Britain), through his grandson, King Charles II of Great Britain, and proceeding directly down through the Spencers, Princess Diana's paternal line, therefore, the title HRH is Princess Diana's birthright.  She doesn't need an "official" decree from a false foreign royal.  Removing the title of *Her Royal Highness from Princess Diana, despite the fact that she had the title when both of her sons were born, could define Prince William and Prince Harry as only half royal but fortunately, due to Princess Diana's extremely royal blue blood, makes William and Harry genuine royals unlike their father and grandmother.  Did Elizabeth II ever consider that?

It is because of Princess Diana's true royal, extremely blue blood (than that of her ex~husband and his family) that her sons are more royal than  Elizabeth and her son.  It is the false foreign German "royals" who currently occupy Buckingham Palace which call into question the "Windsors" doubtful "royal" heritage and would make William and Harry only half royal.

Princess Diana is truly British due to her English, Welsh,  and Scottish  heritage unlike that of her ex~husband and his mother and father and their families (Hanover, Saxe~Coburg~Gotha, etc.) who are false foreign royals and a false monarchy, i.e., impostors.  "The Firm" are actually German, therefore foreign.  They are only the very distant German cousins (indirect heirs) to the Stewarts (Stuarts) who are the true heirs to the British throne.  Thanks to *HRH, The Princess Diana of Wales and her true, direct Plantagenet,  Royal Bruce, Stewart, Tudor and her many lines of direct Royal English ancestry, TRH, The Princes William and Henry of Wales are the first true British heirs to the British Throne
in almost 300 years. 

The monarch of a nation should share the same nationality and blood heritage as the people
he or she reigns over.

HRH, The Princess Diana of Wales defined grace
and elegance under pressure.
She will always remain the "Princess of the People"
and our "Queen of Hearts".