Britain is the world leader in vaping. More people use ecigarettes in the UK than in any other European country. It’s more officially encouraged than in the United States and more socially acceptable than in Australia, where it’s still banned. There is a thriving sector here of vape manufacturers, retailers, exporters, even researchers; there are 1,700 independent vape shops on Britain’s streets. It’s an entrepreneurial phenomenon and a billion-pound industry.