The World Health Organization (WHO) regards childhood obesity as one of the most serious global public health challenges for the 21st century. Obese children and adolescents are at an increased risk of developing various health problems, and are also more likely to become obese adults.
The National Child Measurement Programme (NCMP) measures the height and weight of around one million school children in England every year, providing a detailed picture of the prevalence of child obesity. The latest figures, for 2015/16, show that 19.8% of children in Year 6 (aged 10-11) were obese and a further 14.3% were overweight. Of children in Reception (aged 4-5), 9.3% were obese and another 12.8% were overweight. This means a third of 10-11 year olds and over a fifth of 4-5 year olds were overweight or obese.
Data are also available from the Health Survey for England (HSE), which includes a smaller sample of children than the NCMP but covers a wider age range. Results from 2015 show that 28.2% of children aged 2 to 15 were classed as either overweight or obese.