Boris Johnson was last night taken to hospital after struggling to shake off persistent coronavirus symptoms.
Downing Street stressed that the Prime Minister will undergo tests merely as a precaution, on the advice of his doctor.
His admission to an undisclosed London NHS hospital comes 10 days after he first tested positive for the infection and began self-isolating in his Number 11 flat.
In a Twitter video on Friday, an exhausted-looking Mr Johnson revealed he was still suffering from a high temperature.