June 8 (UPI) — British Prime Minister Keir Starmer issued an ultimatum on Monday to tech companies, including Apple and Google, to prevent explicit images from being taken or viewed on children’s mobile phones within three months or face legislation compelling them to comply.

Speaking at the London Tech Week show, Starmer said the initiative, requiring operating system developers to enable nudity-detection software or other technical fixes, was a global first that would make Britain the first country where children would not be able to shoot, share or view naked images.

“For too long, people have been told that [children sharing explicit images] is simply the price of modern tech — that nothing could be done. That government is powerless. That parents just have to accept it,” said Starmer.

“I reject that completely because tech should adapt to the needs of society, not the other way round. If we are serious about unlocking the opportunities that tech can bring then we must also be serious about preventing those who want to abuse it — the online predators.

“That is why today, I am calling for tech companies operating in this country to introduce vice controls that prevent children from sending and receiving sexually explicit images. Because this is not an impossible challenge. If they choose not, then we will act and we will change the law,” he added.

Adult phone users are exempted from the changes, but will be required to complete an age-verification process to prove they are over the age of 18.

The phone companies have until September to make the change or legislation will be introduced to Parliament requiring the appropriate software is installed on all phones and tablets sold in the four countries of the United Kingdom.

Starmer’s move came four weeks after Minister for Safeguarding and Violence Against Women and Girls Jess Phillips resigned, citing his failure to act on her recommendations to remove the ability for children to take explicit photos of themselves or others.

The government dismissed criticism from advocates of privacy and the right to expression, accusing it of trampling on people’s democratic freedoms.

“The government mandating that all phones in Britain require ID and surveillance software is a crossing of the Rubicon that would make the U.K. one of the most authoritarian internet regimes in the world,” said Big Brother Watch director Silkie Carlo.

Silkie warned it also raised the specter of spyware in the pocket of every person with a phone that would end up being “exploited for other purposes before long.”

Home Secretary Shabana Mahmood said the government’s motivation was stopping the coercion and sextortion of children and that it was not interested in “surveilling or policing” people’s phones.

“There is no reporting, no data collection, no monitoring, and no images leaving the device,” she explained.

The leader of the Conservative opposition Kemi Badenoch questioned how it would be achieved and said the approach was piecemeal, saying there needed to be a total ban that included social media for children younger than 16.

The BBC’s science team said the technical hurdles were considerable because so much of the child sexual abuse material was shared via encrypted apps such as WhatsApp, Signal and Discord, where the content being sent cannot currently be detected.

In April, the government announced it will pass legislation banning children from using smartphones in schools in England. The law will only apply to England because education policy is devolved to the parliaments and assemblies of the other countries of the United Kingdom — Scotland, Wales and Northern Ireland.

The law, an amendment to the government’s flagship education and child well-being bill, formalizes what is already policy in many schools but introduces a “clear legal requirement” that would empower them to enforce it — including removing phones from children before class.

The government is currently also running a public consultation on whether to implement an Australia-style ban on social media for children younger than 16 and a separate initiative to develop screen-time guidance for children older than 5, including the minimum age at which a child should be given first phone and how much time they should be on it.