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The government's chief advisor on obesity says Britain's weight crisis must be tackled as a societal issue, not just a problem for a few individuals.

One in four adults are obese, costing the NHS £5.1 billion pounds a year.

Dr Susan Jebb, Professor of Diet and Population Health at Oxford University, said obesity rates were rising because of changing social habits.

This clip is originally from Richard Bacon on Monday the 21st of July 2014