Activists hold tuna protest in Sainsbury's Portsmouth

As part of a Greenpeace event, dozens of activists went to 70 Sainsbury’s stores last weekend and cleared its shelves of John West tuna, including the Portsmouth store.

They left signs stating that the tuna had ‘Gone West’ in an attempt to mount pressure on the country’s second largest supermarket chain to ensure all the tuna on its shelves is 100 per cent sustainable,

Earlier this year, Tesco and Waitrose announced they will no longer stock John West if the brand doesn’t clean up its act. Greenpeace said Sainsbury’s has been quiet on the issue, despite more than 90,000 people emailing the CEO.

Will McCallum, head of oceans at Greenpeace, said: ‘Sainsbury’s presents itself as a supermarket that takes ethics and sustainability seriously. So we’re sending Sainsbury’s a message that it’s ludicrous they source sustainable fish for their own brand tuna while continuing to stock dirty John West tuna on the next shelf.’