Smokers trying to kick the habit are more likely to succeed if they switch to e-cigarettes.
Scientists said yesterday the electronic alternatives could play important role in reducing smoking rates and cutting tobacco-related illnesses.
Scientists from the University College London's epidemiology and public health department lead the study of almost 6,000 smokers over five years.
But e-cigarettes have left public health opinion split over whether they encourage replacing one bad habit with another.
Concerns have also been raised over the risk of ‘gaping’ re-normalising smoking.
Dr Ralph Rogers explains more.