“Last week the Duchess of Cambridge came into contact with someone who has subsequently tested positive for COVID-19,” a spokesperson for Kensington Palace said on Monday.

“Her Royal Highness is not experiencing any symptoms, but is following all relevant government guidelines and is self-isolating at home.”

Kate, wife of Queen Elizabeth’s grandson Prince William, attended a number of events last week, most prominently the Wimbledon tennis championships in London on Friday.

She toured the SW19 sporting venue, meeting staff in the museum, Centre Court kitchen and sitting with former British tennis star Tim Henman to watch Jamie Murray play in the doubles.

The duchess is patron of the All England Lawn Tennis Club and a keen tennis fan but is now likely to miss the men’s and women’s finals at the weekend.

The 39-year-old had been due to attend an event to celebrate the 73rd anniversary of Britain’s National Health Service on Monday with William, who is not required to self-isolate.

William himself fell ill with the disease last April, at about the same time as his father, heir-to-the-throne Prince Charles, with media reports saying he had been hit pretty badly by the virus.

Under current British rules, contacts of confirmed coronavirus cases must quarantine at home for 10 days.

The duchess, who has received both her COVID jabs, follows the royal household testing regime and takes tests twice a week.

In addition she took tests before visiting Wimbledon and watching England’s Euro 2020 victory against Germany on Tuesday with William and son Prince George – with both results negative.

with PA and AP