As the economic climate deteriorates in the UK, retailers are responding to the increasingly value-conscious concerns of consumers by cutting prices. In answer to a round of price cuts from Asda, Tesco has launched a fresh offensive in the escalating price war with the introduction of 350 new products under the 'Market Value' and 'Discounter' ranges. But is this enough to satisfy shoppers' hunger for value? Katy Humphries reports.