The UK Health Secretary Sajid Javid on Saturday announced that he had tested positive for the deadly Coronavirus and was self-isolating.
Under the country's government rules, Javid is now required to self-isolate for 10 days unless a PCR test comes back negative and he no longer has symptoms.
Any of his "close contacts", potentially including others in the government, would have to self-isolate too if they receive instructions from the state-run National Health Service (NHS).
Javid was reportedly on Friday was at the 10 Drowning Street, but there was no immediate comment from spokespeople as to whether he met face to face with Prime Minister Boris Johnson, who nearly died of Covid last year.
He also appeared alongside ministers in parliament last week, and one government source told The Telegraph newspaper.
Meanwhile, for the first time since mid-January, Britain's daily COVID caseload now exceeds 50,000, and Javid has warned the figure could double from that in the coming weeks.