A woman smoking an electronic cigarette
Media playback is unsupported on your device

Are E-cigarettes safe?

11 February 2013 Last updated at 07:50 GMT

Increasing numbers of smokers have started using electronic cigarettes since the first ban on smoking in enclosed public places, introduced almost seven years ago.

Although smokers have turned to electronic cigarettes for health reasons there are some concerns over their safety and regulation.

Graham Satchell reports.