Chinese-owned social media app TikTok is set to be banned on phones and other devices used by government ministers and civil servants on security grounds.
Cabinet Office Minister Oliver Dowden will make a statement to MPs later.
There has been no official comment - but Security Minister Tom Tugendhat had asked the National Cyber Security Centre to review the issue.
TikTok has strongly denied allegations that it hands users' data to the Chinese government.
The government has come under pressure from senior MPs to follow the United States and the European Commission in banning the app.
The US banned TikTok from official devices in December, and the Commission followed suit last month.
Canada and Belgium 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.
Earlier this week, the prime minister said the UK would "look at what our allies are doing".
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