The move came ten days after the Department of Health criticised leading food companies for failing to reduce the level of salt in food.
In a plan sent to John Reid, the Health Secretary, and Melanie Johnson, the Public Health Minister, manufacturers also agreed that salt in breakfast cereals would fall by a further 9% by the end of the year, a 25% reduction in the past five years.
Companies have also set maximum salt levels for burgers, sausages, pasties and pies.
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