Key points from article :
Poor children in Britain are now fatter than wealthy youngsters.
Total reversal in weight of the two social classes in 70 years.
Poverty has been associated with malnutrition and thinnness.
In 1957, deprived 11-year-olds were 2 kgs lighter than well off kids.
By 2015, the poorest children were 2 kgs heavier than the richest.
Due to considerable changes to diets and physical activity levels.
During rationing diets were high in vegetables and low in fat and sugar.
One in five children are now obese by the time they leave primary school.
The study was published in The Lancet Public Health.
