Vaping revolution': 4.3m Brits now use e-cigarettes - but 350,000 of them have never smoked

A record 4.3 million people are actively vaping in Britain after a fivefold increase in a decade, according to a report.

Some 8.3% of adults in England, Wales and Scotland are now believed to be regular vapers - up from 1.7% (about 800,000 people) 10 years ago.

Action on Smoking and Health (ASH), which compiled the report, said a "revolution" had occurred.

E-cigarettes allow people to inhale nicotine rather than smoke.

The NHS says they carry "a small fraction of the risk of cigarettes" because they don't produce tar or carbon monoxide.

The liquid and vapour contain some potentially harmful chemicals, but at much lower levels. However, the potential long-term effects of vaping are not yet known.

The ASH report says about 2.4 million British vapers are former smokers, 1.5 million still smoke, and 350,000 have never had a cigarette.