Mussels are checked on part of Europe’s largest offshore mussel farm, in the English Channel, some 5km (3 miles) off the Devon coast, southern England, Britain, November 1, 2024. Before Britain left the European Union, mussels and oysters could be shipped to the continent prior to purification. Post Brexit, the EU only accepts purified goods or those from the cleanest British waters, rated Class A. That change has all but destroyed mussel farming in north Wales on Britain’s west coast. The region once produced the bulk of Britain’s exports to Europe but now rarely sells to the continent due to poor water and a lack of bulk purification facilities in the country. The Shellfish Association of Great Britain (SAGB) says British exports would double if the seas were cleaner. REUTERS/Dylan Martinez