Keir Starmer will ban under-16s from major social media apps such as TikTok, Instagram and X in sweeping restrictions described as “Australia plus”, the Guardian understands.

Teenagers will be banned from all the main social platforms and online products that are not covered by the ban – such as gaming apps – will face new restrictions such as having the option to chat to strangers removed. There will also be restrictions for older teenagers up to the age of 18 that prevent “scrolling” late at night – after 8.30pm.