The National Child Measurement Programme between 2006/07 and 2016/17 details “severe obesity”.
It captures the height and weight of over a million children in Reception (aged four and five years) and Year Six (aged 10-11 years) each year.
In 2006/07, when the data was first collated by Public Health England, 3.17 per cent were severely obese.
Now it is 4.07 per cent. Over the same time the number of severely obese girls has risen 2.6 per cent to 3.33 per cent and 3.7 per cent to 4.78 per cent for boys.
The findings also show stark health inequalities continue to widen.
There are more overweight children in poorer areas of England.
Tam Fry, chair of the National Obesity Forum, said: “What is particularly pernicious is Downing Street’s continual refusal to give town halls the powers to stop takeaways opening to sell junk food, a root cause of childhood obesity.”