Prime Minister Boris Johnson spent the night in the hospital after being approved for testing after 10 days of persistent symptoms of the coronavirus. However, the government insisted that he continue to take responsibility on Monday.
The conservative leader announced on March 27 that he had tested positive for COVID-19 and has since isolated himself in his apartment on Downing Street.
On Sunday evening, at the advice of his doctor, the 55-year-old was hospitalized for tests, which his office called a "precaution."
The Times newspaper reported that he had been treated with oxygen.
"He spent the night in the hospital and of course we wish him all the best," his cabinet colleague Robert Jenrick, the housing minister, told BBC television on Monday.
"We hope that these tests will allow him to return to Downing Street as soon as possible."
He said the prime minister, despite his self-isolation, "worked extremely hard" and would remain in command from his hospital bed.
"Of course, he is in the hospital today to do the tests, but he will continue to be informed of what is going on and will be responsible for the government."
Secretary of State Dominic Raab has been nominated to take over if Johnson is unable to act, and he will chair the government's daily coronavirus meeting on Monday morning to replace the prime minister.
"I'm sure this is very frustrating for him, someone like Boris who wants to rule the government from the beginning," said Jenrick.
"Still, he's still very responsible for the government."
(Except for the headline, this story was not edited by NDTV staff and published from a syndicated feed.)