Declining stocks and increased fishing pressure have led to lower sustainability ratings for two popular cod alternatives

UK shoppers have previously been urged to avoid UK-caught cod and to buy European hake or coley instead – but now these fish are in trouble, too.

The Marine Conservation Society (MCS), an environmental charity, publishes its Good Fish Guide to help consumers and businesses make sustainable seafood choices. It uses a traffic-light system to rate seafood according to the health of fish stocks and environmental impact.