Across the UK, thousands of young people are being groomed into so-called county lines drug networks, where promises of money and belonging quickly turn into threats, violence and debt. Channel 4 News was given rare access to those affected by county lines crimes, including a teenager who said ‘his face was set on fire’ by his own friends after refusing to sell drugs. We also join the Metropolitan Police frontline units as they arrest a county lines boss in their efforts to disrupt these crimina