Obesity is a condition in which the natural energy reserve is increased to a point where it is associated with certain health conditions or increased mortality. Body mass index (BMI), is a simple and widely used method for estimating body fat. A BMI over 30 is obese.
Office for National Statistics
The Office for National Statistics (ONS) is the UK’s largest independent producer of official statistics and is the recognised national statistical institute for the UK. It is responsible for collecting and publishing statistics related to the economy, population and society at national, regional and local levels. It also conducts the census in England and Wales every ten years.