“The Prime Minister and Chancellor have been contacted by NHS Test and Trace as contacts of someone who has tested positive for Covid.

“They will be participating in the daily contact testing pilot to allow them to continue to work from Downing Street. 

“They will be conducting only essential government business during this period.”

No prizes for guessing who caused this debacle…

10:40 UPDATE: U-turn announced, Boris and Rishi to self-isolate 

“The Prime Minister has been contacted by NHS Test and Trace to say he is a contact of someone with Covid.

“He was at Chequers when contacted by Test and Trace and will remain there to isolate. He will not be taking part in the testing pilot.

“He will continue to conduct meetings with ministers remotely. The Chancellor has also been contacted and will also isolate as required and will not be taking part in the pilot.”