Sixteen- and 17-year-olds face an overnight social media curfew in an extension of the government’s social media ban for under-16s. Under the plan, aimed at reducing online harms, certain apps would be blocked by default from midnight to 6am. But the curfew will not be mandatory and teenagers can opt out, so will it achieve anything? Annie Kelly speaks to social affairs correspondent Jessica Murray – watch on YouTube. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>