Take a walk down any busy UK high street and you’re bound to encounter dubious characters selling packs of colorful disposable vapes. While selling to minors is banned, these vapes are still winding up in the hands of youth through untracked channels.

Experts estimate 40-50% of vapes sold in Britain break safety and marketing regulations. As the country moves to institute a blanket ban on disposable vaping products, some argue this could perversely expand the thriving illicit market.