People who work in the food service and accommodation industries are more likely to smoke than other workers, with almost a third (31pc) admitting to being smokers, research has revealed.
Those with jobs in water and waste management ranked second, with 29pc of workers currently smoking, followed by the construction industry with 28pc.
This is significantly higher than the national smoking rate of 19pc. The industry with the lowest level of smokers was in education, where just 11pc said they smoked.
The study warned that smoking just one to four cigarettes a day can triple a person's risk of cardiovascular disease and quitting is the single best thing people can do to improve their heart health.
Previous research shows the average smoker takes more sick leave and working breaks compared to non-smoking colleagues.
Lisa Young, project manager for the UK programme, said: "No matter what industry you work in, smoking is extremely damaging to your heart health and the health of your business.
"But this research shows there is still a shocking divide between blue and white-collar professions when it comes to how many of us are taking up this deadly addiction.
"Good health is good business. That's why we want all UK employers to help us tackle these inequalities head-on by helping their workers kick the habit for good."
Health & Wellbeing
As soon as Sinead Quinn clapped eyes on Ronan Clarke she knew there was something special about him. From the same area of rural Mayo as herself, she invited him to her grad and despite going their separate ways for several years afterwards; the couple reunited, married and had three beautiful daughters.