There are around 1.7million people in the country who are at a higher risk of diabetes, health experts say.
Those people who are more likely to suffer from the condition should be referred to exercise and nutrition classes, according to the National Institute for Health and Care Excellence (NICE).
NICE has updated its guidance with more information for those people who are at greater risk because of high glucose levels in their blood.
Professor Mark Baker, director of the centre for guidelines at NICE, said: “We know that helping someone to make simple changes to their diet and exercise levels can significantly reduce their risk of developing type two diabetes, and that this approach is a cost-effective way of managing an illness that currently costs the NHS around £8.8billion a year.”
Professor Baker added: “We need to make sure that the people most at risk have access to the care they need. This is why this updated guidance from NICE is so important, it will help NHS England and Public Health England to prioritise when necessary.”