Britons have been eating the iconic national dish since the mid-19th century , but with around 30 % of the world 's fish stocks thought to be over-exploited , the Prince of Wales has concerns . The Prince of Wales is concerned about sustaining stocks of fish , used in Britain 's favorite meal . Britons consume fish and meat twice as much as any other British dish . Environmental groups want to introduce a code to ensure fish is responsibly consumed .
The Prince of Wales is concerned about sustaining stocks of fish , used in Britain 's favorite meal . Britons consume fish and meat twice as much as any other British dish . Environmental groups want to introduce a code to ensure fish is responsibly consumed .