Poorer children are more likely to be fat.
As we move further to the right of the chart into schools in more deprived areas, the share of children in the grey and black parts of the chart – showing overweight and very overweight kids – gets bigger.
This means that a class of year six children in inner-city Manchester will likely have bigger waistlines than one in leafy Hampshire.
A combination of bad diets and a lack of exercise means poorer children are sadly more likely to be fat at just 10 or 11 years old, with all the health problems that brings now and stores up for the future.