geijlsngi15 Experts say it is not yet known what harm the tobacco-free devices could inflict and that their contents could be damaging young people's health.

An estimated 1.3m people in the UK use e-cigarettes which were designed to help smokers quit.

Ministers also plan to make it illegal for adults to buy traditional cigarettes for anyone under 18.

'Irresponsible adults'

They want to crack down on the number of young people smoking by bringing the law in line with restrictions on the sale of alcohol.

The new rules could be in force by the autumn and may mean anyone caught buying cigarettes for a child could be given a ￡50 fixed penalty notice or a fine of up to ￡2,500.

"We must do all we can to help children lead a healthy life," Public Health Minister Jane Ellison said.