The Queen has been advised by doctors to rest for at least the next two weeks, Buckingham Palace has said.
It means the 95-year-old monarch will be unable to attend the Festival of Remembrance on Saturday 13 November.
The monarch is said to remain in “good spirits”, however, and this afternoon recorded a speech for the COP26.
It comes after she was forced to pull out of attending the upcoming climate summit after a busy recent schedule.