This article reports on inequalities in obesity prevalence, between rich and poor children, and quotes Michael Marmot.
'The children of Camberwell Green are among the fattest in England. Half of ten- and 11-year-olds there are overweight or obese (meaning that a boy of average height would weigh over 40kg, as opposed to a healthy 35kg or so). By contrast, in Dulwich Village, a few miles south, where household incomes are twice as high, only a fifth of children are in that category, one of the lowest levels in the country. Poor children have been fatter than rich ones since around the 1980s.'