Police are investigating the death of a woman who was found dead in her tent at a popular techno festival in Norfolk over the weekend.

The woman, who has not been publicly identified, was found unconscious in a tent on a campsite on the last day of Houghton festival at Houghton Hall in north Norfolk.

The hall is home to David Cholmondeley, the 7th Marquess of Cholmondeley, and his wife Rose Hanbury, friends of the Prince and Princess of Wales.

The woman was pronounced dead at the scene on Sunday, despite efforts by an on-site medical team to save her.

Police are treating her death as unexplained while they await the results of a post-mortem examination, but they say they do not believe there were any suspicious circumstances.

A spokesman for the festival said: “We are deeply saddened to confirm that a person has passed away at Houghton 2026.

“Our thoughts are entirely with their family and loved ones at this difficult time.

“We are grateful to our onsite medical team, event response team and to Norfolk Constabulary, who all responded immediately.

“We continue to work closely with the relevant authorities to support in any way we can with their investigations.”

A police spokeswoman said they were investigating and that the woman’s next of kin had been informed.

Houghton festival, which draws 10,000-strong crowds, is known for its house and techno music, played around the clock in the 1,000-acre grounds.

The festival, which has been running at the estate every year since 2017, is the UK’s only 24-hour music festival. Tickets cost between £280 and £330.

Houghton Hall, built in the 1720s for Britain’s first prime minister, Sir Robert Walpole, is set in extensive parkland near William and Kate’s country retreat at Sandringham.

In 2023 the Princess of Wales attended the festival, accompanied by security guards and a group of friends.