It has emerged that a member of Buckingham Palace staff tested positive for coronavirus while The Queen was still in residence.
It is not known what responsibilities the affected staff member holds at the palace, or how close they would have been to the 93-year-old monarch.
According to The Sun on Sunday, the aide fell ill early last week, and has since been confirmed as having the highly infectious COVID-19.
Other staff members who have been in contact with the aide have since been quarantined.
A Palace spokesperson said: “We wouldn’t comment on individual members of staff.
“In line with the appropriate guidance and our own processes, we have taken the necessary actions to protect all employees and people involved.”
A source told The Sun: The worker tested positive before the Queen left for Windsor. But the Palace has 500 members of staff so, like any workplace, it’s not inconceivable it would be affected in some stage.”
The Queen and the Duke of Edinburgh with arrived at Windsor Castle last week. They are expected to remain there for the foreseeable future.