Britain's online safety law risks suppressing free speech due to its heavy-handed enforcement, social media site X said on Friday, adding that significant changes were needed. "When lawmakers approved these measures, they made a conscientious decision to increase censorship in the name of 'online safety'," it said in a statement. A UK government spokesperson said it is "demonstrably false" that the Online Safety Act compromises free speech. "As well as legal duties to keep children safe, the very same law places clear and unequivocal duties on platforms to protect freedom of expression," the spokesperson said. Ofcom said on Thursday it had launched investigations into the compliance of four companies, which collectively run 34 pornography sites.