The Welsh Labour Government's proposal to ban the use of e-cigarettes in public places has been based on the premise that they could act as a gateway to tobacco.In the world of evidence-free legislation this is a special case. With cigarettes there is evidenced harm caused by second hand smoke, that does not apply with e-cigarettes. And now newly published research has cast doubt on claims that e-cigarettes attract non-smokers. The Western Mail reports that the Welsh Health Survey asked regular users of vaping devices if they had previously been tobacco users, and almost every single respondent said yes:As Kirsty Williams says:Back to the drawing board for the Welsh Labour Government it seems.