The Queen's annual family pre-Christmas lunch has been cancelled amid rising coronavirus cases.
The festive lunch, which usually sees the Royal Family celebrate en masse, will not take place this year, as the Queen acts with caution to protect her loved ones.
A source said the decision was a precautionary measure, made after the rapid spread of the new Covid-19 variant made it apparent that it would put "too many people's Christmas arrangements at risk" if it went ahead.
The gathering usually involves dozens of members of the family, along with members of the household cooking and serving.
This year, it had already been moved from its usual venue of Buckingham Palace to Windsor Castle.
Royal-watchers had hoped they would be able to once again enjoy the photographs of the family dressed in their finest arriving at the party in their cars, after a break last year.
The Queen had hoped to go ahead with plans to see her extended family gathered together at Tuesday lunchtime to mark the end of what has been a difficult year.
Aides had indicated she would be mindful of government messaging and the changing Covid-19 situation in making a final decision, always seeking to set an example even if it means personal sacrifice.
This morning, it was confirmed that the pre-Christmas family lunch would not go ahead.
A source said: "While there is regret that it is cancelled, there is a belief it is the right thing to do for all concerned."
Buckingham Palace has not yet confirmed arrangements for the Royal Christmas at Sandringham.
Plans are in place for it to go ahead, complete with a walk for members of the family, usually including the Prince of Wales, Duchess of Cornwall, Duke and Duchess of Cambridge and their children.
But for the second year running, aides are mindful of safety concerns during the pandemic. It may again prove necessary to avoid crowds gathering to see the Royal family.