The featured ingredients this time are barley, a grain grown here since before the Romans arrived, and an exotic newcomer to the British larder, shitake mushrooms. The mushrooms come from Lancashire, where farmer John's business is booming as his shitakes are shipped all over the UK. In Berwickshire, farmer Roy sends off his barley crops to make crackers, cereal and nutritional drinks, and to feed a hungry lifeboat crew.