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LONDON, ENGLAND - AUGUST 27: Vape Lab employee Leonardo Verzaro uses an E-Cigarette while working on August 27, 2014 in London, England. The Department of Health have ruled out the outlawing of 'e-cigs' in enclosed spaces in England, despite calls by WHO, The World Health Organisation to do so. WHO have recommended a ban on indoor smoking of e-cigs as part of tougher regulation of products dangerous to children. (Photo by Dan Kitwood/Getty Images)

LONDON, ENGLAND - AUGUST 27:  Vape Lab employee Leonardo Verzaro uses an E-Cigarette while working on August 27, 2014 in London, England. The Department of Health have ruled out the outlawing of 'e-cigs' in enclosed spaces in England, despite calls by WHO, The World Health Organisation to do so. WHO have recommended a ban on indoor smoking of e-cigs as part of tougher regulation of products dangerous to children.  (Photo by Dan Kitwood/Getty Images)