Queen Elizabeth and Prince Philip are now well enough to travel.
On Thursday, a royal spokesperson confirmed that the couple is now at the queen's estate in Norfolk, England -- Sandringham -- after they delayed their travel on Wednesday due to the two coming down with "heavy colds." Queen Elizabeth, 90, and Prince Philip, 95, left Buckingham Palace by helicopter and landed in less than one hour.
The queen is still scheduled to address the nation in her annual Christmas Day speech on Sunday.
WATCH: Queen Elizabeth and Prince Philip Cancel Annual Christmas Trip Due to Illness
Traditional Christmas activities for the royal family include attending church in the morning, opening presents, going back to Sandringham Palace for lunch and then watching the queen's speech in the afternoon, royal expert Katie Nicholl told ET earlier this month.
The monarch has recently taken a step back from her royal duties, in order to reduce her workload. On Tuesday, she announced that she was stepping down as patron of 25 organizations. She will be handing over her patronage of certain groups to other members of the royal family including her grandson, Prince William, and Kate Middleton.
On Monday, Will and Kate, alongside Prince Harry, continued their busy schedule, when they attended a Christmas party together hosted by youth support service The Mix in London. The Mix is a charity which offers confidential support to young people online, through social media and via a phone helpline.
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Meanwhile, Harry's girlfriend, Suits actress Meghan Markle, is expected to spend the holiday in Los Angeles with her family. "[Harry] knows the rules of the royal family and he knows that until they get engaged, Meghan will not have a place around that Christmas dinner table," Nicholl previously told ET. "If you think about all those years that Prince William was courting Kate Middleton, she had to wait 10 years until she was invited to Sandringham. Harry and Meghan have only been dating for a few months."