New research has revealed that the smoking ban, designed to help protect people from secondhand smoke may have helped 400,000 people give up the habit.
The research revealed that smoking fell by 5.5 per cent in the nine months after the ban, compared with just 9.9 per cent in the previous nine months.
Professor Robert West, who carried out the research at the Health Behaviour Research Unit, explained his surprise at the impact of the ban.
He said: "These figures show the largest fall in the number of smokers on record. The effect has been as large in all social groups - poor as well as rich."
According to Jean King, director of tobacco control at Cancer Research UK, the results of the survey illustrate the fact that the ban is "saving lives".
There are now calls from tobacco pressure group ASH to introduce further measures to stop people smoking. Proposals include plans to ban people smoking in their own cars if their children are in there and removing all cigarette vending machines.
Primary lung cancer is the most common cause of cancer death in the UK and 33,000 people die of the disease each year.
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