PRIME Minister Boris Johnson, who has gone into coronavirus self-isolation after being in contact with an MP who has covid-19, is "absolutely fine", Matt Hancock has said.

The Health Secretary told Times Radio that he understands that the Tory MP Lee Anderson is also "OK".

"The Prime Minister is absolutely fine," Mr Hancock said.

"He's self-isolating because he's been in close contact with Lee Anderson.

"Mr Anderson has coronavirus, and I understand he's OK.

"And the Prime Minister's self-isolating because he's been in close contact and you know these are the rules that we all live by now and the Prime Minister is following the rules, exactly the same as everybody else."

Boris Johnson tweeted that he was "in good health and have no symptoms" after being instructed to self-isolate.

The Prime Minister, who was admitted to intensive care with coronavirus in April, said he was notified by NHS Test and Trace on Sunday that he must self-isolate.

In a video posted to Twitter he said: "Hi folks, the good news is that NHS Test and Trace is working ever-more efficiently, but the bad news is that they've pinged me and I've got to self isolate because someone I was in contact with a few days ago has developed Covid.

"It doesn't matter that we were all doing social distancing, it doesn't matter that I'm fit as a butcher's dog, feel great - so many people do in my circumstances.

"And actually it doesn't matter that I've had the disease and I'm bursting with antibodies.

"We've got to interrupt the spread of the disease and one of the ways we can do that now is by self isolating for 14 days when contacted by Test and Trace."