Severe obesity in 10 to 11 year olds has reached a record high, according to figures from the National Child Measurement Programme.
The findings also show that prevalence of excess weight, obesity, overweight and severe obesity are higher in the most deprived areas compared to the least deprived.
However, there is a downward trend of obesity in Reception age boys, and fewer Reception age boys and girls and Year 6 girls are underweight.
The Department of Health and Social Care recently announced the second chapter of its Childhood Obesity Plan to help halve childhood obesity by 2030.
Main actions include mandatory calorie labelling on menus; and restrictions on price promotions on foods high in fat, salt or sugar. These measures will go out for consultation later in 2018.