The World Tonight

Close to 500 people have become ill with salmonella linked to imported eggs. UK authorities say they have identified two new clusters of the infection. One British egg producer tells us that domestic eggs are subject to more stringent safety standards than those coming from overseas.
Also in the programme: France has temporarily relaxed rules for making some of its best-known cheeses after the summer drought drastically reduced the amount of grass available to feed milk herds. And author Katherine Rundell on the third book in her Impossible Creatures fantasy series, and whether technology is harming children’s ability to consume literature.

The Facebook and Instagram owner will also make changes aimed at better protecting kids using their platforms, including default daily time limits and night-time blocks. We hear the reaction of Arturo Béjar, who worked as a safety engineer for Meta for 8 years, but has since turned whistleblower and gave evidence during the trial.
Also in the programme: A flash flood on the Nepal-Tibet border has killed more than 150, with hundreds of tourists missing. And the vice chair of the Dollywood Foundation – which was created by Dolly Parton to support children’s education – reflects on the death of the country music legend.

With tributes pouring in from around the world, we look back at the life and career of the legendary American singer.
Also on the programme: Canada hits back in its trade war with the US, levying tariffs of up to 50% on American goods; and a new report finds that people who leave the care system are much more likely to die young.

Some analysts have called Operation Economic Outcast a ‘damp squib’, given the lack of measures aimed at China – which buys roughly 90% of Iran's oil. We get an assessment of the sanctions and whether the Trump administration is likely to follow through on its threats to Iran’s trading partners.
Also in the programme: Middlesbrough Mayor Chris Cooke discusses organised crime in the region after a car crash on the A66 killed seven people, including two police officers. And scientists say they’ve created a protein-rich cookie from recycled plastic.

Former rugby union and league players claim not enough was done to prevent brain injuries. Governing bodies argue robust systems are in place to minimise the risks to players. We hear from former Wales international rugby player Alix Popham, who’s been diagnosed with early onset dementia and probable CTE.

Also in the programme: the Panama Canal's operator is to cut the number of vessels passing through the key waterway due to low rainfall caused by El Niño. And we speak to the cast and director of a play exploring the relationship between former prime ministers Winston Churchill and David Lloyd George.