Boris Johnson is in “good spirits” after spending a “comfortable” night in hospital and remains there under observation, Downing Street has said.
The prime minister’s official spokesman said he continues to lead the government and has been working on official papers from his hospital bed.
Mr Johnson was admitted to hospital on Sunday night for tests after continuing to display symptoms of COVID-19 the disease caused by the coronavirus.
The PM wrote on Twitter: “Last night, on the advice of my doctor, I went into hospital for some routine tests as I’m still experiencing coronavirus symptoms. I’m in good spirits and keeping in touch with my team, as we work together to fight this virus and keep everyone safe.”
He also praised the “brilliant” NHS staff taking care of him – describing them as the “best of Britain” – as well as reiterating government advice for people to “stay at home to protect the NHS and save lives”.
His spokesman declined to give any details of the treatment Mr Johnson has received – or when he might be discharged.
“The prime minister was admitted to hospital for tests last night as a precaution,” he said.