Professor Mike Kelly, of the health watchdog Nice, has said it is difficult for obese children to lose weight without help from their families.
Speaking on Daybreak, he said that spiralling obesity was to blame for a range of childhood diseases that were not seen in children several decades ago.
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Thousands of junior doctors and their supporters, wearing surgical masks, will hold a demonstration over pay and conditions.
The eight-month-old female pup, which was severely underweight and dehydrated, was asleep in a dining booth.
The improving state school standards mean more parents are choosing not to pay for private education according to the Good Schools Guide.