Mention Lucy Letby and you're likely to get a strong reaction. The nurse was sentenced to spend the rest of her life in prison for murdering seven babies and attempting to murder seven more. But though two juries have convicted her, and she has twice been denied permission to appeal, it seems everyone has an opinion on whether she really did it. She has become the centre of an information war. The name Lady Justice Thirlwall, however, attracts less recognition. She's the judge who's been tasked with examining how Letby was able to commit her crimes at the Countess of Chester Hospital in 2015-2016, and whether her managers should have responded differently when suspicions about her were raised.

Leading artificial intelligence assistants create distortions, factual inaccuracies and misleading content in response to questions about news and current affairs, research has found. More than half of the AI-generated answers provided by ChatGPT, Copilot, Gemini and Perplexity were judged to have "significant issues", according to the study by the BBC. The errors included stating that Rishi Sunak was still the prime minister and that Nicola Sturgeon was still Scotland's first minister; misrepresenting NHS advice about vaping; and mistaking opinions and archive material for up-to-date facts. The researchers asked the four generative AI tools to answer 100 questions using BBC articles as a source. The answers were then rated by BBC journalists who specialise in the relevant subject areas.