Can butchers at London's Smithfield Market detect differences between compassionately reared organic beef and non-organic meat from the supermarket shelf? Rick Stein and Chalky find out as they continue their nationwide culinary quest.
Director/Producer David Pritchard RT DIRECT: Rick Stein 's Food Heroes paperback book, £10.99 (RRP £12.99) including p&p. To order, call [number removed]7979 (national rate)