Nearly 1m tonnes every year: supermarkets shamed for plastic packaging

Exclusive: Guardian investigation unwraps truth about supermarket plastics after big brands refuse to divulge packaging secrets

• Read more: The plastic-free stores showing the big brands how to do it

Britain's leading supermarkets create more than 800,000 tonnes of plastic packaging waste every year, according to an investigation by the Guardian which reveals how top chains keep details of their plastic footprint secret.

As concern over the scale of unnecessary plastic waste grows, the Guardian asked Britain's eight leading supermarkets to explain how much plastic packaging they sell to consumers and whether they would commit to a plastic-free aisle in their stores.