The Queen is under medical supervision at Balmoral after doctors became concerned for her health, Buckingham Palace has said.
All the Queen's children are gathering at, or are travelling to, her Scottish estate near Aberdeen.
" Following farther evaluation this morning, the Queen's croakers are concerned for Her Majesty's health and have recommended she remain under medical supervision," a statement said.
The Queen is" comfortable", it added.
It's veritably unusual for Buckingham Palace to put out a statement like this it's generally unintentional to give a commentary on the 96- time-old monarch's medical matters, which are seen as private.
Her son, Prince Charles, is at Balmoral with his woman , Camilla, the Duchess of Cornwall.
Her grandson, the Duke of Cambridge, other sons, the Duke of York and the Earl of Wessex, and his woman Sophie, the Countess of Wessex, arrived at Aberdeen field just before 1600 BST.
They've travelled to the Queen's Scottish estate, about 40 long hauls( 64 km) west of Aberdeen.
Her son Princess Anne was formerly in Scotland bearing engagements and is in Balmoral.
The Duchess of Cambridge has remained in Windsor with her children on their first full day at academy.
The Duke of Sussex is travelling independently to Balmoral. A spokesman said his woman Meghan wasn't accompanying him. The US- grounded couple had been in the UK to attend a charity function.
There are easily pressing enterprises for the Queen's health- important further explicitly put than ahead and without any reference to this only being about difficulties with mobility.
There are also warnings against unsupported enterprise, similar as that she might have had a fall. And on Tuesday she was mugged smiling as she appointed new Prime Minister Liz Truss.
But from the last- nanosecond cancellation of what would only have been a virtual meeting of the Privy Council- of elderly ministers- there's no mistaking the fragility of the Queen's health.
Ms Stilt said the" whole country" would be" deeply concerned" by the news.
" My studies and the studies of people across our United Kingdom- are with Her Majesty The Queen and her family at this time," she added.
The Queen appointed Ms Truss as high minister at Balmoral, rather of travelling to London for the event.
During her 70- time reign the Queen has generally had an followership with her new high minister at Buckingham Palace.
The Archbishop of Canterbury, Justin Welby, said" My prayers, and the prayers of people across the( Church of England) and the nation, are with Her Majesty The Queen moment.
" May God's presence strengthen and console Her Majesty, her family, and those who are minding for her at Balmoral."
The Queen is also head of state for 14 Commonwealth realms, and Canadian Prime Minister Justin Trudeau said the country was" wishing her well, and transferring our stylish to the Royal Family".
The White House said US President Joe Biden had been briefed and that his and First Lady Jill Biden's studies were" solidly and exactly with the Queen moment and her family".
Her grandson, the Duke of Cambridge, other sons, the Duke of York and the Earl of Wessex, and his woman Sophie, the Countess of Wessex, arrived at Aberdeen field just before 1600 BST.
They've travelled to the Queen's Scottish estate, about 40 long hauls( 64 km) west of Aberdeen.
News of the Queen's ill- health came as MPs heard details of the government's new plan to help homes and businesses with energy costs in the House of Commons.
Chancellor of the Duchy of Lancaster Nadhim Zahawi entered the Commons and spoke to Ms Truss. Notes were also passed to the Commons speaker and Labour front bench. The palace statement came twinkles latterly.
Labour leader Sir Keir Starmer said in a statement he was" deeply upset", while Scotland's First Minister Nicola Sturgeon transferred her studies and wishes to the Queen.
Wales' First Minister Mark Drakeford transferred his stylish wishes on behalf of the people of Wales.
The monarch has been on a summer break at her Scottish home since July.
walls have been being placed outside one of the entrances to the estate.
Meanwhile, a restrained crowd gathered at Buckingham Palace, the monarch's sanctioned London hearthstone, under dark skies and with rain showers read.
