As public concern continues to spurn the push for a ban on e cigs, industry experts worry that smokers will return to tobacco products. "There's a very real danger that you're going to send a lot of those people back to smoking," says Michael Clapper, Chairman of the Electronic Cigarette Industry Trade Association.

"We've got an NHS waiting list building up again thanks to smoking related illnesses and as far as businesses are concerned its short sighted of them because we know the science says they don't harm other people," said Clapper.

Estimates in the UK show public venues are largely in support of bans even though the number of electronic cigarette users have grown to numbers exceeding two million. Even with the rising number of e cig smokers, a poll by YouGov and The Sunday Times found 60% of people were in favor of the ban on e cigs in public buildings.

The vapors emitted by electronic cigarettes are mostly water vapors, but non-smokers have found reasons to speculate. Even though experts have determined the concentrations of e-cig carcinogens is far less toxic than cigarettes, and the toxins that are emitted are far below the levels required to be a risk to others, e-cig skeptics are still pushing for bans.

Shirley Cramer, of the Royal Society for Public Health, understands why certain people and organizations want firmer regulations. "Now, what we're seeing is this precautionary principle," says Cramer. "Employers and people in transport are taking the line 'we banned tobacco, we're going to ban vaping because we don't know enough'. There will be more evidence of their long-term effects eventually, but it's very interesting because if you've already banned it, would you un-ban it?"

Pierre Durand, of The Vape Lab in London’s Shoreditch, is part of one establishment all for people using their electronic cigarettes in public. As a fundraiser for the coffee club, Durand insists that people educate themselves regarding electronic cigarettes before they place unnecessary bands on products they know nothing about. "There are many people that need to be educated because since it's a disruptive technology there's not much knowledge and people don't know everything they should know."