Senior British royals were travelling to the Balmoral estate on Thursday to be with Queen Elizabeth II after doctors raised alarms about her health.
The queen's four children all went to the monarch's Scottish country residence after the queen, 96, was placed under the medical supervision.
Prince Charles, the heir to the throne, travelled with his wife Camilla, Duchess of Cornwall. His son Prince William went to Balmoral without his wife Kate, Duchess of Cambridge, who was looking after their children in their first week back at school.
Prince Harry, who is on a visit to Europe from his American home, cleared his diary to join his family in Scotland. There were conflicting reports about the whereabouts of his wife Meghan, Duchess of Sussex.
Prime Minister Liz Truss, who was at Balmoral on Tuesday to be formally appointed by the queen, said the country would be "deeply concerned" about her health.
The news that the queen was unwell filtered through just as Ms Truss was making a major policy announcement on energy to MPs.
Amid worried glances in the House of Commons chamber, Speaker Lindsay Hoyle interrupted the debate to say the queen and royal family were "in our thoughts and prayers".
Sir Keir Starmer, the leader of the opposition, said he was "deeply worried" by the news from Buckingham Palace, while London Mayor Sadiq Khan wished the queen a swift recovery.
Former prime ministers Tony Blair and David Cameron also expressed their concern, while Archbishop of Canterbury Justin Welby said the nation's prayers were with the queen.
The statement issued by the palace at lunchtime said doctors were "concerned for Her Majesty’s health and have recommended she remain under medical supervision".
She "remains comfortable and at Balmoral," it said.
The queen, who marked 70 years on the throne this year, has cancelled a number of public appearances in recent months owing to what aides described as mobility problems.
She unusually remained at Balmoral on Tuesday to receive departing prime minister Boris Johnson and invite Ms Truss to form a government, a formality that would usually take place in London.
The distance learning plan
Spring break will be from March 8 - 19
Public school pupils will undergo distance learning from March 22 - April 2. School hours will be 8.30am to 1.30pm
Staff will be trained in distance learning programmes from March 15 - 19
Teaching hours will be 8am to 2pm during distance learning
Pupils will return to school for normal lessons from April 5
'Ghostbusters: From Beyond'
Director: Jason Reitman
Starring: Paul Rudd, Carrie Coon, Finn Wolfhard, Mckenna Grace
Rating: 2/5
The biog
Marital status: Separated with two young daughters
Education: Master's degree from American Univeristy of Cairo
Favourite book: That Is How They Defeat Despair by Salwa Aladian
Favourite Motto: Their happiness is your happiness
Goal: For Nefsy to become his legacy long after he is gon
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Who was Alfred Nobel?
The Nobel Prize was created by wealthy Swedish chemist and entrepreneur Alfred Nobel.
- In his will he dictated that the bulk of his estate should be used to fund "prizes to those who, during the preceding year, have conferred the greatest benefit to humankind".
- Nobel is best known as the inventor of dynamite, but also wrote poetry and drama and could speak Russian, French, English and German by the age of 17. The five original prize categories reflect the interests closest to his heart.
- Nobel died in 1896 but it took until 1901, following a legal battle over his will, before the first prizes were awarded.
Dhadak 2
Director: Shazia Iqbal
Starring: Siddhant Chaturvedi, Triptii Dimri
Rating: 1/5
BULKWHIZ PROFILE
Date started: February 2017
Founders: Amira Rashad (CEO), Yusuf Saber (CTO), Mahmoud Sayedahmed (adviser), Reda Bouraoui (adviser)
Based: Dubai, UAE
Sector: E-commerce
Size: 50 employees
Funding: approximately $6m
Investors: Beco Capital, Enabling Future and Wain in the UAE; China's MSA Capital; 500 Startups; Faith Capital and Savour Ventures in Kuwait
SERIES INFO
Afghanistan v Zimbabwe, Abu Dhabi Sunshine Series
All matches at the Zayed Cricket Stadium, Abu Dhabi
Test series
1st Test: Zimbabwe beat Afghanistan by 10 wickets
2nd Test: Wednesday, 10 March – Sunday, 14 March
Play starts at 9.30am
T20 series
1st T20I: Wednesday, 17 March
2nd T20I: Friday, 19 March
3rd T20I: Saturday, 20 March
TV
Supporters in the UAE can watch the matches on the Rabbithole channel on YouTube
The Bloomberg Billionaire Index in full
1 Jeff Bezos $140 billion
2 Bill Gates $98.3 billion
3 Bernard Arnault $83.1 billion
4 Warren Buffett $83 billion
5 Amancio Ortega $67.9 billion
6 Mark Zuckerberg $67.3 billion
7 Larry Page $56.8 billion
8 Larry Ellison $56.1 billion
9 Sergey Brin $55.2 billion
10 Carlos Slim $55.2 billion
