British Prime Minister Boris Johnson has tested positive for coronavirus. He is presently in self-isolation.

"Over the last 24 hours I have developed mild symptoms and tested positive for coronavirus," he said on Twitter.

"I am now self-isolating, but I will continue to lead the government's response via video-conference as we fight this virus."

On Wednesday, Prince Charles tested positive for the coronavirus. He is in self-isolation in Scotland with mild symptoms. His wife Camilla, who tested negative for the virus, is self-isolating in a separate part of their estate.