Overcrowded and understaffed: life in England’s crumbling prisons

When Mark Lanier and his young client Kaley faced Meta and Google in an LA courtroom earlier this year, it seemed a bigger battle than David v Goliath. Lanier, however, was determined to prove the companies had not just stumbled into a youth mental health crisis, but had helped to engineer it. Help support our independent journalism at theguardian.com/infocus

The US government has been forced to pay billions in refunds to companies that were hit by Donald Trump’s ‘liberation day’ tariffs. The US has paid out $81bn (£61bn) this fiscal year after the supreme court ruled the tariffs were illegal. Lucy Hough speaks to Chris Michael, the International editor for Guardian US – watch on YouTube. Help support our independent journalism at theguardian.com/infocus

Sperm counts are in decline worldwide, and testosterone levels are said to be plunging, but male infertility still carries a stigma. Prof Michael Carroll on what every man should know. Help support our independent journalism at theguardian.com/infocus

Counter-terrorism police are now leading the investigation into the death of the former MP and Reform UK spokesperson Ann Widdecombe, in light of ‘new information and evidence’. A 28-year old white British man from Rotherham, South Yorkshire, was arrested on suspicion of murder on Saturday. Lucy Hough speaks to the Guardian’s head of national news, Archie Bland – watch on YouTube. Help support our independent journalism at theguardian.com/infocus

Senior China correspondent Amy Hawkins on China’s embrace of AI, from medical avatars to food delivery drones and state surveillance. Help support our independent journalism at theguardian.com/infocus