UK salmonella cases nearing 500 as egg investigations continue

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.