The Queen is under medical supervision at Balmoral after doctors became concerned for her health, Buckingham Palace has said.
It said in a statement: “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.”
Her Majesty postponed her Privy Council meeting last night after being advised by doctors to rest.
On Tuesday, the Queen met outgoing PM Boris Johnson before appointing the new prime minister, Liz Truss, at Balmoral for the first time in her reign, in a break from tradition.
Ms Truss this afternoon tweeted that the whole country would be “deeply concerned” by the news, adding her thoughts were with the monarch and her family.