Boris Johnson was tonight admitted to hospital for tests due to "persistent" coronavirus symptoms. Although Downing Street has insisted that the step was "precautionary" and that the Prime Minister will continue to run the country, it raises questions about what happens if he needs to stay in for prolonged treatment.
He is currently in a London NHS hospital and is believed to be staying in overnight at the very least. But if the Prime Minister is off sick with coronavirus, who's running the country?
Here's what we know about who's in charge while Johnson is still ill. Who's in charge? Up to now Number 10 has said Boris Johnson has been able to do his job in self-isolation.