The United Kingdom will require social media companies to implement a default block for adolescent users aged 16 and 17 at certain hours, the country’s Department for Science, Innovation & Technology revealed on Tuesday evening.This automatic new curfew would theoretically lock older teens out of social platforms between the hours of midnight and 6 am—though the feature can be turned off. The nonmandatory restriction is to be imposed along with a looming total ban on these services for children under 16, expected to come into force in spring 2027. Both measures come after the Online Safety Act, a controversial set…