The death of Queen Elizabeth II: September 8, 2022

Prince Harry is still en route to Balmoral Castle, CNN royal correspondent Max Foster reports, and the family is likely waiting for him to arrive before any announcements on Queen Elizabeth II are made.

Prince Harry is traveling to Balmoral from London, according to UK’s PA Media news agency. 

Foster also described the family's rushed arrival to Balmoral Castle in Scotland earlier Thursday to be with Queen Elizabeth II as news of her declining health broke.

"They normally travel separately. They are all in one car. Their faces are stark. Prince Andrew in the front very close to the Queen and Prince Edward also increasingly close to the Queen in recent years because he has been taking on more and more responsibilities and you know we just have to look at those faces and try to read what we can into them and they are all in the same car and they didn't have to be. It feels to me like they... rushed to get there as quickly as possible and this was the most efficient way," Foster said in reference to a photo of members of the Royal family arriving at the castle.

Dozens of onlookers, tourists and well-wishers of Queen Elizabeth II gathered outside Buckingham Palace in London on Thursday following the news that the monarch was under medical supervision.

Many people have also gathered near the Queen Victoria Memorial, across from the Palace. Others are staring through the gates. 

The Queen is not currently in her London residence — the Palace said in a statement earlier on Thursday that she "remains comfortable and at Balmoral" castle in Scotland.  

The rain and gray skies did little to stop London tour guide Nicholas Player, 41, from visiting the palace once he finished work.

He described the news of the Queen's ill health as "sad" but told CNN he had every hope she would recover.

"She is part of everyone's life; she's bridged the gap between many age groups," he said as he held an umbrella with a Union Jack design.

"(She's) the grandmother of the nation, really, and I don't think there's one person who really doesn't like her," he added.

CNN's Anna Stewart contributed to this report.

Prince William has been photographed driving the Queen's sons Prince Andrew and Prince Edward, along with Edward's wife Sophie, Countess of Wessex, into Balmoral Castle.

The group of royals entered the estate moments ago after traveling to Scotland to be with the Queen.

A convoy of vehicles containing Prince William and other members of the royal family has driven into Balmoral Castle through the main gate, per live visuals and UK media.

"A fleet of cars believed to be carrying the Duke of Cambridge, Duke of York and the Earl and Countess of Wessex arrived at Balmoral just after 5pm. The plane carrying the royal party had arrived at Aberdeen Airport just before 4pm," according to the UK’s PA Media news agency.

Prince Harry is also on his way to the castle, a spokesperson for the Sussexes told CNN.

US President Joe Biden has been briefed on news that Queen Elizabeth II’s doctors are concerned for her health as members of the Royal Family travel to Balmoral, Scotland, and conveyed well wishes to British Prime Minister Liz Truss during a call Thursday. 

“The President has been briefed, of course, this morning and will be updated throughout the day concerning news out of the United Kingdom,” John Kirby, the National Security Council director for strategic communications, told reporters Thursday. 

Biden, Kirby added, “did convey to Prime Minister Truss, who was on the video teleconference (with allies and partners regarding Ukraine) that he and Dr. Biden are thinking very much about the Queen and the family and the people of the United Kingdom.”

The spokesperson for the United Nations Secretary-General António Guterres has also voiced the UN chief’s thoughts to the British royals.

“I think we’re all following the developing story in the United Kingdom, and I just want to say from the secretary general’s point of view, that his thoughts are with the Queen, her family, and the people of the United Kingdom at this time," UN Secretary-General spokesman Stéphane Dujarric said.

CNN’s Richard Roth and Zenebou Sylla contributed reporting to this post.

Prince Harry is on his way to Balmoral separately from other royals, but has been in coordination with other family members' plans, a spokesperson for the Sussexes told CNN. 

Clarification: Meghan, the Duchess of Sussex, is not traveling to Balmoral with Prince Harry, the Duke of Sussex, a spokesperson for the Sussexes clarified in a note to CNN. It is not clear if Meghan will potentially join at a later date. 

There are no plans currently for UK Prime Minister Liz Truss to travel to Scotland on Thursday or Friday, UK's PA Media news agency reported citing a Downing Street spokesperson.

Canadians are keeping Queen Elizabeth in their thoughts, Prime Minister Justin Trudeau said in a tweet on Thursday. 

Queen Elizabeth II is Queen of Canada and Canada's head of state, and the "personal embodiment of the Crown in Canada," according to the Canadian government's website.

A flight containing some members of the royal family has landed at Aberdeen airport in Scotland ahead of their arrival at Balmoral, according to the UK's PA Media news agency. 

Prince William, the Duke of Cambridge, Prince Andrew, the Duke of York and Prince Edward and Edward's wife Sophie, the Earl and Countess of Wessex, were among the members on board, according to PA.

Prince Harry and his wife Meghan have also made the journey to Balmoral on Thursday. Harry and Meghan live in California but have been in Europe this week.