Labelling led to an average 1.8% reduction in the calories people bought – equating to 11 calories in a 600 calorie meal – or ...

They can be ground into a nutritious meal, like ground almonds and chestnut flour ... be significantly higher – up to 20 percent – than the actual calories we digest and metabolise.

But the most extensive real-world findings to date suggest the policy is 'no silver bullet', with an average reduced intake of just 11 calories per 600-calorie meal.