The Queen is expected once again to spend her Christmas break in her Sandringham estate as she has traditionally done for years, surrounded by her close family and some guests. While the monarch may not expect Prince Harry and Meghan Markle to attend the celebrations this year, Her Majesty will be expecting all other attendees to abide by the one "sacrosanct" rule she has set for Christmas Day. Speaking to Nine News Australia, the Queen's former spokesman Dickie Arbiter said: "They sit down at one o’clock, they have a traditional Christmas lunch like any of us do – there’s turkey, all the trimmings, Christmas pudding, Christmas cake.
"But they finish no later than a quarter to three so they can all go watch the Queen and her Christmas message.
"That is sacrosanct, everybody has got to watch it, whether they want it or not."
The Queen and her family retreat to the Norfolk country retreat after attending mass at the nearby St Mary Magdalen Church, where royal supporters have long gathered to wish merry Christmas to Her Majesty and to catch a glimpse of the popular members of the Royal Family.
Mr Arbiter continued: "The first thing is they’ll go to church at 11 o’clock.
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The Queen has one "sacrosanct" rule the whole family must obey on Christmas Day (Image: GETTY)
The Queen's Christmas message is broadcast on Christmas Day afternoon (Image: GETTY)
"The Church is St Mary Magdalene, on the estate, and the service lasts about 45 minutes and then the younger members of the family walk down to Sandringham House. The older ones, they go by car.
"There’s a bit of a walkabout because there’s a lot of well-wishers, probably 300-400 well-wishers – they traditionally go to Sandringham to see the royals.
"Then the royals go back to the big house, there’s a little bit of a reception, a few drinks."
While the Queen has been escorted to mass by grandsons Prince William and Prince Harry, and their wives Kate, Duchess of Cambridge, and Meghan Markle, the monarch may have to part with the company of the Duke and Duchess of Sussex in 2019.
The pair is believed