Gregg Wallace reminisces about rhubarb and heads to Yorkshire to meet the plucky growers who have triumphed in the face of adversity. In the kitchen, he demonstrates that rhubarb has more to offer than a filling for crumble. Meanwhile, Ainsley Harriot reminds us of the taste of a fresh pea straight from the pod. Over ninety percent of the peas grown in Britain are frozen and he argues that we're missing out on one of our best homegrown treats by not eating them fresh.