The Government is due to announce figures on the levels of obesity around the country on Wednesday.
The Department of Health is announcing statistics on obesity, diet and physical activity.
The information comes a day after research showed a rising tide of obesity in the UK was fuelling an increase in cases of diabetes.
The findings suggest that the rate of diabetes in the UK is increasing faster than in the US, where prevalence of the disease is one of the highest in the world.
Health campaigners say eating a healthy, balanced diet and doing at least 30 minutes of physical activity is the only way of defusing the "diabetes time bomb".
Separate research out on Wednesday also shows being obese increases the risk of early death just as much as smoking.
A study found that being an obese non-smoker was the equivalent of somebody of a healthy weight smoking more than 10 cigarettes a day.