Ministers are drawing up plans for national restrictions on the promotion of unhealthy products

One in ten advertisements on London transport is for junk food and faces a ban because of an obesity “time bomb”, Sadiq Khan said yesterday.

However, the mayor of London was challenged by a leading dietician who said that the concept of junk food was simply a middle-class insult for poor people’s diets. Catherine Collins, a registered NHS dietician, argued that “nutriprejudice” was behind efforts to clamp down on the advertising and promotion of unhealthy foods.

“Artisan, organic, local produce doesn’t mean ‘healthier’ nutritionally: it just refers to provenance and perhaps assuages those who need to be reassured of their food sourcing,” she said, pointing out that many high-end products contained just as much fat, salt and sugar as confectionery or burgers. For example, some