Would a calorie tax tackle obesity?

Campaigners are urging the Government to bring in a calorie levy following the rollout of the so-called sugar tax.

Companies producing high-calorie processed food should be taxed to encourage healthier versions, said Action on Sugar and Action on Salt.

This would hold manufacturers to account and lead to products with "excessive" calories being reformulated with less fat as well as sugar, the groups said.

Julia Hartley Brewer clashed with Dr Kawther Hashem, Campaign Lead at Action on Sugar based at Queen Mary University.

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