The rise of 'mega-dairies' could create a backlash market for 'free range' milk according to one farming expert. The annual Sherston Mangold Hurl could be put at risk due to a lack of mangolds: the vegetables that villagers traditionally hurl each year. And a mushroom expert warns foragers not to eat funghi that they do not recognise as being safe. Presented by Anna Hill. Produced by Martin Poyntz-Roberts.