Prince Harry and his wife, Meghan Markle, who left the British royal family and settled in the United States, have such a strong position in royal circles that they will not be affected by the loss of public titles.
Despite being a controversial decision, the final decision rests with Queen Elizabeth, and royal biographer Sean Smith is convinced that the Queen will not do so.
A media outlet called Express UK quoted the royal biographer as saying that Prince Harry would remain the Duke of Sussex, and I (Sean Smith) had no doubt about that.
This is because Prince Charles will be the king's son when he becomes king, and they will both return to the formalities that take place in Britain.
Sean Smith is so adamant on his claim that he believes his official address to the Duke and Duchess of Sussex can never be withdrawn. It doesn't matter to them.
During the interview, the royal biographer said that despite what the royal palace wants, such speeches are ridiculous because I don't call them Duke and Duchess of Sussex, and they are Harry and Meghan for me. Similarly, I will never refer to the Duke and Duchess of Cambridge, but they are William and Kate, no one can deny that.