The government is introducing new rules on sourcing trees - which could place more importance on growing in the UK, in line with the country’s tree planting targets. From June anyone getting a grant can only get trees from approved suppliers, in an effort to improve tree health and prevent pests. Plus, all this week we’re looking at glasshouse production, which typically might make you think of salad leaves, peppers, and tomatoes; but there are some unlikely crops being cultivated under glass too - such as trees! The Wash in East Anglia, which runs just south of Skegness to Hunstanton, supports around 60 boats fishing cockles, mussels and brown shrimp for generations. It’s also an important overwintering site for hundreds of thousands of migratory birds. There’s always been tension between fishing and wildlife, managed by an agreement, but it expires this year. Helen Mark visits for this week's Open Country. And free-range egg producers say that because of the rising costs they face, retailers should add 40p to the price of a dozen eggs. We've had listeners get in touch to say they'd be happy to pay more, but how much can consumers really impact supermarket pricing? Presented by Charlotte Smith and produced for BBC Audio by Caitlin Hobbs