Labour leader Sir Keir Starmer has gone into coronavirus self-isolation after a member of his household developed symptoms.
He will continue working from home, but will not take part in Commons proceedings on Monday.
The situation emerged shortly after he took part in a show on LBC, and the Labour leader’s office has alerted the broadcaster.
Sir Keir shared a studio with host Nick Ferrari during the phone-in show.
A spokesman for Sir Keir said: “This morning Keir Starmer was advised to self-isolate after a member of his household showed possible symptoms of the coronavirus.
“The member of his household has now had a test. In line with NHS guidelines, Keir will self-isolate while awaiting the results of the test and further advice from medical professionals.”
With Boris Johnson opening debate on the controversial Internal Market Bill in the Commons, Sir Keir would normally have been expected to respond in the chamber for Labour.
Instead, former Labour leader and shadow business secretary Ed Miliband will lead the opposition’s response.
The Prime Minister’s official spokesman said Mr Johnson had spoken to Sir Keir and passed on his best wishes.