Fresh, chilled and frozen mackerel will be unavailable by 29 April
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Fresh, chilled and frozen mackerel will be unavailable by 29 April
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Supermarket chain says it will point customers to herring and other species to protect threatened Atlantic stocks
Rapid changes to ocean temperatures bring obstacles and opportunities to UK's fishing fleet
Conservationists have warned cod populations are ‘at dangerously low levels’
The supermarket said the water may contain shards of glass
While some species could thrive in warmer British waters, scientists warn others could struggle
The chains have been accused of sending edible food to landfill
