UK Prime Minister Boris Johnson has tested positive for coronavirus and is self-isolating after developing mild symptoms.

He confirmed the test result on Twitter, saying he will continue to lead the government's response to the virus.

So far, over 11,600 cases have been confirmed in the UK, among which 578 were fatal.

It was not immediately clear how many Downing Street staff and senior ministers would now need to isolate given that many have been in contact with Johnson in recent days and weeks.

Earlier this week, Charles, Prince of Wales was also infected, making him the first UK royal family member to test positive for the coronavirus.