The Queen is under "medical supervision" at Balmoral after concerns were raised about her health, Buckingham Palace has said.
The monarch, 96, pulled out of a virtual Privy Council on Wednesday, a day after appointing Liz Truss as Prime Minister at her home in the Scottish Highlands. And on Thursday afternoon, the Palace released a statement, explaining that the Queen remains comfortable but is under supervision.
A Palace spokesperson said: "Following further evaluation this morning, the Queen's doctors are concerned for Her Majesty's health and have recommended she remain under medical supervision. The Queen remains comfortable and at Balmoral."
Read More: Queen cancels traditional Balmoral welcome event prompting health fears
The Queen's close family, including the Prince of Wales have been informed, with the latest announcement escalating fears for the monarch's health.
In the House of Commons, Speaker Sir Lindsay Hoyle interrupted the speech of SNP Westminster leader Ian Blackford during the energy debate to tell MPs: "I know I speak on behalf of the entire House when I say that we send our best wishes to Her Majesty the Queen and that she and the royal family are in our thoughts and prayers at this moment." He added: "If there is anything else, we will update the House accordingly."
Prime Minister Liz Truss said "the whole country will be deeply concerned by the news from Buckingham Palace this lunchtime" adding "my thoughts - and the thoughts of people across our United Kingdom - are with Her Majesty The Queen and her family at this time".
The nation's longest-reigning monarch has ongoing mobility issues and looked bright but frail and used a walking stick during Tuesday's historic audience with Ms Truss, which followed a visit from outgoing prime minister Boris Johnson as he tendered his resignation.
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