This might have been brought up in a previous discussion, so forgive me if it has...
I was thinking today, if Prince Harry were to marry and have children while Elizabeth II is still alive, what would his children's styles be?
If my memory serves me correctly, Queen Victoria issued letters patent granting the style of Royal Highness to the children of the eldest son of the Prince of Wales. And I know that in 1917, George V issued letters patent only granting the style Royal Highness to male-line grandchildren of a monarch, but not great-grandchildren.
Obviously, if Harry were to have children after Charles came to the throne, they would bear the style of Royal Highness from birth since they would be male-line grandchildren of the reigning sovereign.
But if Prince Harry were to have children while his grandmother was still the reigning monarch, would his children bear the style of Royal Highness, or not? Because that would make them great-grandchildren of the reigning monarch, but they wouldn't be descended from the eldest son of the Prince of Wales.
If anyone can shed light on this just to satisfy my curiosity that would be appreciated.