The supermarket giant will work with the not-for-profit organisation on what it has dubbed a “ground-breaking” Sustainable Basket Metric.

The tool will assess the environmental impact of staple grocery products such as bread, milk, bananas, salad tomatoes, iceberg lettuce, free-range eggs, salmon fillets, steak mince and canned tuna chunks.

Foods will be tracked against seven key criteria: climate change, deforestation, sustainable diets, sustainable agriculture, marine sustainability, food waste and packaging waste.