Major technology companies have been asked to bring in more robust age checks for under-13s in the UK, similar to those currently in place for services designed for adults.
The platforms contacted by media regulator Ofcom and data watchdog the Information Commissioner's Office (ICO) are Facebook, Instagram, Snapchat, TikTok, YouTube, Roblox and X.
They have been told they should do more to make sure younger children are kept safe online.
Ofcom Chief Executive Melanie Dawes said services were currently "failing to put children's safety at the heart of their products".
The companies have defended the safeguards they have in place, with YouTube owner Google saying it was surprised by Ofcom's approach, urging it to focus on higher risk services instead.
