Almost half of British teenagers say they feel addicted to social media, according to findings that come amid mounting pressure for big tech companies to be held accountable for the impact of their platforms on users.The finding, from the Millennium Cohort study, adds to evidence that many people feel they have lost control over their use of digital interactive media. It comes as dozens of US states are suing Instagram and its parent company, Meta, accusing them of contributing to a youth mental...