British government ministers have been banned from using Chinese-owned social media app TikTok on their work phones and devices on security grounds.
The government fears sensitive data held on official phones could be accessed by the Chinese government.
Cabinet Minister Oliver Dowden said the ban was a “precautionary” move but would come into effect immediately.
TikTok has strongly denied allegations that it hands users’ data to the Chinese government.
But Prime Minister Rishi Sunak had been under pressure from senior MPs to follow the US and the European Union in barring the video-sharing app from official devices.
Government departments – and individual ministers – have enthusiastically embraced TikTok as a way of getting their message out to younger people.
Use of the app has exploded in recent years, with 3.5 billion downloads worldwide.
Its success comes from how easy it is to record short videos with music and fun filters, but also from its algorithm which is good at serving up videos which appeal to individual users.
It is able to do this because it gathers a lot of information on users – including their age, location, device and even their typing rhythms – while its cookies track their activity elsewhere on the internet.
US-based social media sites also do this but TikTok’s Chinese parent company ByteDance has faced claims of being influenced by Beijing.
Some politicians are reluctant to give up the TikTok habit, despite the security warnings.
Cabinet minister Grant Shapps – an enthusiastic TikTokker – reacted to the ban by posing a clip from the film, Wolf Of Wall Street, in which Leonardo DiCaprio, playing a New York stockbroker, uses a series of expletives and declares: “The show goes on”.
Mr Shapps called the ban “sensible”, but added: “I’ve never used TikTok on government devices and can hereby confirm I will NOT be leaving TikTok anytime soon!”
Ministers have not been banned from using the site on their personal phones – just their work devices.
But Nadine Dorries – who experimented with TikTok videos when she was culture secretary – said she would be deleting the app from her personal phone, adding: “I think all MPs should do likewise”.
Hours before the ban was announced the Ministry of Defence (MoD) uploaded a video of a Challenger 2 tank, a type being supplied to Ukraine, to its TikTok account.
The MoD said it would continue to use the app “to promote the work of the Armed Forces and to communicate our support to Ukraine”. The department’s sensitive data is “held on a separate system”, it added.
TikTok said it was “disappointed” by the UK government’s decision, which it said was “based on fundamental misconceptions and driven by wider geopolitics, in which TikTok and our millions of users in the UK, play no part”.
“We remain committed to working with the government to address any concerns but should be judged on facts and treated equally to our competitors,” said a spokesman.
A handful of Western journalists were found to have been tracked by ByteDance employees. ByteDance says they were fired.
A US TikTokker shared a video criticising the Chinese government’s treatment of the Uighur Muslims, and it was taken down. TikTok said this was a mistake.
This has added to the nervousness of governments and security specialists – despite the firm’s consistent denials.
The Chinese state demands loyalty from all businesses based in the country and nobody really knows to what extent ByteDance might be pushed to comply with demands for data.
The United States barred TikTok from official devices in December, and the European Commission followed suit last month. Canada, Belgium and India have taken similar action.
China has accused the US of spreading disinformation and suppressing TikTok amid reports the White House wants its Chinese owners to sell their stakes in the firm.
TikTok insists it does not share data with Chinese officials, but Chinese intelligence laws requires firms to help the Communist Party when requested.
Western social media apps such as Facebook, Instagram and Twitter are blocked in China.
The UK Parliament closed its TikTok account last August. The Downing Street TikTok page has not been updated since Boris Johnson left office in September last year.