Food Unwrapped

Kate Quilton investigates the reason baking potatoes cost more

In Lincolnshire, Kate Quilton sees whether shallots are actually just small onions and visits a potato farm looking for the reason baking potatoes cost more. Matt Tebbutt heads to frozen food company McCain to see how potatoes are transformed into their various products, most notably chips. Helen Lawal is in Spain to find out why it is possible to get sheep's cheese in the supermarket, but never sheep's milk