Buckingham Palace reported that doctors advised the monarch to “rest.”

Queen Elizabeth II of Great Britain will not take part in the UN Climate Conference (COP26) in Glasgow due to the recommendation of doctors to “rest” after a night stay in the hospital, Buckingham Palace said.

“Her Majesty has regretfully decided to cancel her trip to Glasgow” to attend the reception on November 1, the palace said in a statement.

“Her Majesty is upset that she will not be able to take part in the reception, but she will address the assembled delegates with a recorded video message,” the message continues.

The 95-year-old Queen had a busy schedule in early October, but last week, she canceled a visit to Northern Ireland on the advice of doctors.

On Thursday, October 21, she spent the night at the Edward VII Private Hospital for “preliminary studies.”

Her first hospital stay since 2013 and the delay with which the palace announced it had raised concerns about the Queen’s health, given her age.