Boris Johnson’s chief adviser Dominic Cummings is self-isolating after experiencing symptoms in line with those of coronavirus.
The 48-year-old is said to have developed these over the weekend.
While self-isolating he is expected to keep in touch with Downing Street colleagues remotely.
Downing Street declined to comment on Mr Cummings’s situation this morning.
Dominic Cummings is chief adviser to Boris Johnson
As well as having been a prominent figure in Mr Johnson’s team, Mr Cummings is also known for his role in the Vote Leave campaign ahead of the EU referendum.
His self-isolation comes just days after the Prime Minister, who is also working from home while isolating, confirmed he had been diagnosed with Covid-19.
Health Secretary Matt Hancock has also contracted the virus .
While Chief Medical Officer for England Chris Whitty is self-isolating due to symptoms, as is Scottish Secretary Alister Jack.