Earlier this week English farmers drove tractors into London and held a rally outside Parliament, protesting at what they say is a lack of support for British food production. Just a few hours before that rally the Government announced a change in the rules for environmental schemes. Farmers will now only be able to put 25% of their land into schemes which take land out of food production to try to address concerns about food security. Brexit has cost Scotland up to £100m a year in 'lost' salmon exports, MSPs were told this week. Why is wool so worthless for farmers? The price they get for a fleece barely covers the cost of shearing. Presented by Charlotte Smith and produced by Beatrice Fenton.