Three years ago travel writer Lydia Gard discovered freediving. An extreme and beautiful sport defined by one objective: to dive as deep as you can on one single breath. It soon became a calling. And then she stumbled on a darker side of the sport. Rumours were swirling that a group of top divers were doping to go deeper. So she decided to investigate. Deep Water is the latest Tortoise Investigates series from The Observer.

With Prince Harry in effective exile and Andrew disgraced, the Royal family is smaller than ever before and at a potential crisis point. Prince William has already signalled his intention to be a different kind of monarch to King Charles. But can the monarchy survive, and what is its purpose?

Over the summer, Epping, a small town on the outskirts of London became the scene of mass protests featuring hundreds of people. Noisy and occasionally violent, the demonstrations attracted crowds from around the country and plenty of media attention. But what really happened in Epping and what does it tell us about where the right in Britain is heading?