William's silence over Andrew may be because he's putting his family's mental health first

In the political arena, you will often see people try to capitalise on the wrongdoings or failures of others.

For Prince William this week, at a time when his team want to show us he's not afraid to speak out or question what's happening in the world, it would have been easy for him and his advisers to try to draw comparisons between him and his uncle Andrew's failings. They didn't.

It is another point of difference with how the royals operate, and those in the political sphere, into which he stepped at COP30 in order to use his diplomatic soft power. In fact, even try to ask palace sources about how William felt about the recent scandal potentially overshadowing his trip to Brazil and the response: "He was here for Earthshot and that's what he's delivered.

He comes with no other agenda but to bring about positive change and you've seen the people of Brazil embrace him this week." For three days, we followed Prince William all over Rio de Janeiro and beyond - a welcome distraction after the most difficult few weeks for the Royal Family. Even before the problems with his uncle Andrew, this was a royal tour with a big purpose.

Every element - from volleyball on Copacabana beach, a kick around with a Brazil football legend, visiting mangroves off a remote island, his glitzy Earthshot Awards, to his carefully crafted speech for COP30 - was designed to show us more about the style and focus of the heir to the throne. After everything that's happened, it could have felt forced.

It didn't. Instead, it was a showcase.

"This could have been difficult," one palace source told me, "but you've seen the future king lead by example, keeping calm, carrying on, making real impact." As we filmed him talking to young environmental campaigners at Rio's Maracana stadium, he knew our camera was close, and yet it felt like he wanted us to hear his thoughts on leadership, or the current lack of it, loud and clear. "If we wait for good leaders all the time, we're going to wait a very long time, you guys are my hope…you've got the ambition." Travelling about with him, it feels even more obvious how he wants to do things differently.

His trip to the island of Paqueta was just one example of how, for him, listening to people in those communities is more important than the bilateral meetings with political figures that mean so much to the government which sends him on these trips. Showing the "value of authenticity.