Labour leader Keir Starmer is self-isolating at home after a member of his private office staff tested positive for coronavirus.
Sir Keir is "doing well" and has not shown any symptoms of the disease, a Labour spokesman said.
The 58-year-old will work from home in line with Government regulations until his period of self-isolation ends.
He was pictured visiting the Portsmouth Gin Distillery in Southsea, Portsmouth, along with shadow chancellor Anneliese Dodds on Thursday.
It comes just weeks after Prime Minister Boris Johnson was forced to self-isolate in Downing Street for a fortnight after having close contact with Tory MP Lee Anderson, who later tested positive for Covid-19.
A Labour spokesperson said: "Keir is well and not showing any symptoms.
"He will now be working from home."
It is understood Sir Keir will stay at home until December 16 – 14 days after he last came into contact with the staff member concerned last Tuesday.
This is the second time that he has been required to self-isolate.
In September Sir Keir went into quarantine when one of his children developed possible symptoms of the disease only for a test to come back negative two days later.
