Among 17-year-olds in the UK, one in ten will have used hard drugs, such as ketamine and cocaine, a study by the University College London suggests. Nearly a third of 17-year-olds had tried cannabis and more than half admitted to binge-drinking alcohol. Almost 20,000 young people, born between 2000 and 2002, were surveyed as part of the Millennium Cohort Study. Drug-use rates were higher among white teens than black teens. A quarter of 17-year-olds had assaulted someone, including shoving, slapping or punching, over the previous 12 months. Levels of vandalism and weapon use were similar to when they were 14 but shoplifting rose from 4% in early adolescence to 7% a few years later. It remains to be seen how the Covid-19 pandemic has affected engagement in these behaviours.