Supermarket chain says it will point customers to herring and other species to protect threatened Atlantic stocksWaitrose has become the first UK supermarket to suspend the sale of mackerel because of overfishing and will start pointing customers toward herring and other species.The Marine Conservation Society warned last year that stocks were at breaking point owing to overfishing, and it downgraded mackerel from a three to a four on its five-point Good Fish Guide sustainability scale. Continue