@MrsTabithaTwitchit
It’s only children of male children of the monarch ( this was changed in 2012) so Zara and Peter would have had to be given titles.
Edward rejected the Prince/Princess titles for his children and they are titled as an Earls children .
The LP’s regarding titles didn’t change when the primogeniture rule changed. It’s still the case that only male line children automatically get title.
Edward’s children use titles of an Earl’s children, but they have the full title.
Quote from an interview with Sophie Wessex confirmed as much...
Sophie opened up about why Louise and James do not have HRH titles in a rare interview last year.
She told The Times: "We try to bring them up with the understanding they are very likely to have to work for a living.
"Hence we made the decision not to use HRH titles.
"They have them and can decide to use them from 18, but I think it’s highly unlikely."