Today in Focus

Three babies might have survived and others could have been protected if hospital staff had taken action over concerns about the nurse Lucy Letby, an inquiry has found. Lady Justice Thirlwall, who led the inquiry, found there was a ‘complete failure to protect babies on the neonatal unit’ at the Countess of Chester hospital. Letby is serving 15 whole-life prison terms for murdering seven babies and attempting to murder seven more. The former neonatal nurse says she is innocent and is fighting to overturn her convictions. Nosheen Iqbal speaks to the Guardian’s north of England editor, Josh Halliday. Help support our independent journalism at theguardian.com/infocus

Reform UK have just been showered with £72m in donations by billionaires. What does that money buy and what will the party do with it? Peter Walker explains. Help support our independent journalism at theguardian.com/infocus

The actor Sydney Sweeney is under fire for ‘sexualising women’s sports’ in an ad campaign for US sports prediction company Novig, which features a series of images of her in various states of undress as she pretends to play different sports. The ad has been widely criticised by a number of sportswomen, including Olympic swimmer Ariarne Titmus who described it as ‘infuriating’ and a ‘kick in the teeth’ to women who have ‘spent decades perfecting their craft’. Sweeney has responded by saying the ad was about ‘embracing a fun idea’. Lucy Hough speaks to Guardian feature writer Elle Hunt – watch on YouTube. Help support our independent journalism at theguardian.com/infocus

A series of figures in the tech world have been warning about – and even resigning over – the existential threat posed by AI. How worried should we be? With technology editor Robert Booth. Help support our independent journalism at theguardian.com/infocus

25 years on from the terror attacks that killed almost 3,000 people in New York City, Washington DC and Pennsylvania, the dark legacy of September 11 continues to unfold in the US and across the world. A throughline can be drawn from that day in 2001 to much of the geopolitics and conflicts of today. Annie Kelly speaks to the Guardian’s international security correspondent, Jason Burke, about how 9/11 changed the world – watch on YouTube. Help support our independent journalism at theguardian.com/infocus