The Queen has been advised to rest for the next two weeks by doctors after undergoing tests in hospital.
Buckingham Palace has announced The Queen will only undertake "desk-based duties" for the next two weeks.
It comes after she underwent tests in hospital last week and cancelled a two-day trip to Northern Ireland.
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The advice from doctors means she will not undertake any official visits, including the Festival of Remembrance on Saturday, November 13.
But the palace made clear The Queen has the "firm intention" of leading the nation in honouring the country's war dead on Remembrance Sunday on November 14.
In a statement, Buckingham Palace said: "Following on from their recent advice that the Queen should rest for a few days, Her Majesty's doctors have advised that she should continue to rest for at least the next two weeks.
"The doctors have advised that Her Majesty can continue to undertake light, desk-based duties during this time, including some virtual audiences, but not to undertake any official visits.
"Her Majesty regrets that this means she will be unable to attend the Festival of Remembrance on Saturday, November 13..
"However, it remains The Queen's firm intention to be present for the National Service of Remembrance on Remembrance Sunday, on November 14."
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