Meanwhile, smokers have been buying nicotine canisters online for years and importing them for use in the devices that can be sold here. Some outlets, as we report today, are now selling them with nicotine to customers over 18 on the assumption that will be allowed eventually and nobody is stopping them.
The uncertainty persists because public health experts and anti-smoking campaigners have been divided over whether e-cigarettes are a good thing. Some see them as an effective way to give up tobacco, others fear they maintain the culture of smoking and may tempt newcomers to try tobacco.
But ordinary observation suggests "vapers" are overwhelmingly former smokers and vaping is certainly better for them than tobacco. So why the hold-up in legalising them?
It must be the culture that worries the public health professionals. They might not approve of people sucking anything but fresh air into their lungs, but they know they need better reasons that to restrict a product in demand. They say they have found some carcinogens in the vapour but those do not sound very serious.
They also dispute whether e-cigarettes help people to quit smoking. They might not quit vaping but that should not be the test. Vaping is obviously less harmful and its legality should be cleared up.