We now have all the tools to do it. Computers are a billion times more powerful, the data is vastly better, our understanding of psychology is vastly better – we have all the elements we need now to do these things and to do them well.

This is where people expect me to reveal some magical formula I've discovered in the caves of Indonesia. You're going to be disappointed. I'm about to tell you some of the simplest, most mundane things in the world. They're so basic that many people don't even want to bother with them. But trust me, these basics are far more important than attending a breathwork class three times a week.

The first and most important part of tackling mental health challenges is to drive cultural change. If you don't change the culture around mental health- people will continue to be stigmatised, people will continue to stay silent, people will not seek the help they need.

When you go out to run 100 miles – the lessons of a lifetime get compressed into 24 hours of non-stop running.

I often hear people say that everything that matters must be measured, and if it can't be measured, it doesn't matter. I believe the absolute reverse. Nothing that matters can be measured.