Prince William, Prince Harry, and Catherine

Interviewer: So a real insight into why you and Prince Harry set up the Royal Foundation. Did you ever imagine it would grow like this? Prince William: I think when we first started it started as a very small idea with Harry and I scratching our heads, going, "How can we do something that's gonna help us in the future?

How are we gonna build something that's gonna provide almost a vehicle to allow us to, impact in charitable areas?" 'Cause it was quite difficult at the time. Harry and I used to go to a lot of engagements and see these incredible charities doing really great work, but felt that we could give more, and how could we do that?

And so the foundation idea sort of bubbled up as a sort of vehicle to be able to do more when we when we walked away from these engagements. So you both take credit for coming up with the idea? Totally. Are there any particular moments that stand out for you or people you've met along the way?

I think for me, I think probably Unite for Wildlife was quite a big moment for me, where I realized the convening power, of what we could do.

I think getting the seven leading global conservation NGOs and charities together in one room, and getting them to unite behind one particular focus, I thought that was, that was when I realized that actually maybe this had got some legs, this has got some real ability to do something. Because I found uniting people together and bringing them together made so much.

It broke down barriers, it made things move much quicker, much smoother, and actually we got more impact from that. And then leading on to that, the Mental Health Campaign, Heads Together, I think, you know, basically we replicated the same thing again on a sort of national scale.

And I think it surprised all of us how much it took off and again, the fact that we had these leading experts who'd been working in the mental health field for way longer than we had, but we felt that we could, we could provide,

Well, they provided the foundation and the solidity of the campaign, and we could then help provide some of the, some of the other conduits. Interviewer: Duchess, we can definitely give you credit for coming up with the idea to work together on the campaign around mental health.

How did that come about, and why was that important for you? Catherine: It's very generous of you to say it was an idea, but actually it was actually going back right to the beginning, when we were looking at the different ways in which we could all work with the foundation.

And I suppose I'd learnt through sort of meeting some of my patronages, that there were sort of all these underlying causes across so many different sectors. Mental health just kept on flagging up every time, whether it's with addiction or school support, and with vulnerable young children. So, it's something that I felt very passionately about.

But it's obviously such a huge topic. It wasn't as big as I actually thought it was, but it was something that I think all three of us at the time felt that we really could make a far bigger impact together on, rather than just one of us acting alone on it. And how much of a difference did it make, the three of you behind that call to action?

Well, I felt, I've always felt really strongly in sort of putting ideas together. Sort of we all had very different areas that we were working with, sort of Harry with dealing a lot with knife crime, William with a lot with homelessness, and for me with sort of, yeah, addiction and things.