They don't all prep, which is part of the problem. Will has been several times now on record saying he doesn't read his briefs and their non-preparedness has shown many times over. Once notably when they didn't greet the Spanish king, who was walking past them and he was moving to shake hands and the two just ignored him. This was a few years ago at a WWII commemoration.I’m talking about prep for normal engagements where they turn up and know all about an organisation and how they work etc, they’ve learned all the info, know the right questions etc that takes time and effort and isn’t factored into the time spent on the number of engagements a year.
Will laughingly said he doesn't read his briefs as recently as just before the pandemic hit.
Charles famously doesn't need his briefs, as he's been always preparing by himself doing loads of research, so by the time his team would present him with briefs, he'd know all of that and then some. Sadly Charles's private life casts a long shadow over his work, because in the work department he's frikkin fantastic and is extremely well prepared for the role of king.
Kate's extension bonds have been visible, but again, it's not a crime that she wears extensions, it's just a simple fact. She has great hair without them, always had.