It will inform regulations to implement the ban which ministers have said they aim to introduce to parliament this year.

Three of the methods identified by Ofcom — photo ID matching, using a digital ID service, or banking-based checks — require a passport or driving license at some stage, while the fourth, facial age estimation, may in some cases need to be followed by a supplementary check using one of the other methods because of a high margin of error at younger ages.

“This ban will shape the future of children’s lives online, so it’s important to get it right,” Ofcom CEO Melanie Dawes said.

While the age checks would involve processing of personal data, “available methods can be delivered in a way that protects users’ privacy and complies with data protection law,” Ofcom said.

It also said social media platforms should take steps to mitigate circumvention, like enabling users to report suspected underage accounts, and using age inference technology to spot activity from users who may be underage.

The regulator said it will consult on further guidance for platforms once regulations to implement the social media ban are laid.