Most UK dairy farms are failing to meet environmental regulations aimed at protecting rivers from pollution; so says the campaign group River Action which has used freedom of information requests to find new data. It says dairy farms are one of the biggest causes of river pollution. The National Farmers' Union says farmers are getting better. Companies importing food to the UK say the Government's plans to bring in physical checks for food coming from the EU is going to lead to higher prices, and eventually less choice. All this week we're talking about diversification, and for farms which are near towns or cities attracting visitors onto the land can be profitable. We hear how a Devon farm has diversified into Halloween pumpkins. Presented by Charlotte Smith and produced by Beatrice Fenton.