The new Prime Minister Liz Truss and leader of the opposition Sir Keir Starmer left the House of Commons abruptly after they were handed notes about the Queen.
A palace spokesperson confirmed Queen Elizabeth is under medical supervision, with doctors concerned for her health shortly after lunchtime on Thursday (September 8).
It comes as the Prince of Wales, Duke of Cambridge and the Duchess of Cornwall made their way to Balmoral in Scotland - where the Queen is currently residing.
READ MORE: Queen under medical supervision at Balmoral with doctors 'concerned for her health'
The Prime Minister and leader of the Labour party were both speaking in the House of Commons as Ms Truss announced a new package of support for the energy bill crisis as they were notified of the Queen's demise.
Ms Truss was on the front bench of the Commons when she received the concerning news. The initial indication that something was wrong came as Chancellor of the Duchy of Lancaster, Nadhim Zahawi, came into the Chamber, sat down next to the Prime Minister and began urgently speaking to her while she was listening to Labour leader Sir Keir Starmer’s response to her energy statement.
Sir Keir, too, was passed a note by his deputy Angela Rayner, with Commons Speaker Sir Lindsay Hoyle also handed a piece of paper updating him about the developing situation.
Labour's deputy leader and Ashton MP Angela Rayner can be seen being handed a note during the debate, before both Liz Truss and Sir Keir Starmer left the chamber - as MPs were told about the Queen's medical situation.
Speaker of the House of Commons, Sir Lindsay Hoyle, read a message from the Prime Minister shortly after saying: "I know I speak on behalf of the entire house when I say we spend our best wishes to Our Majesty the Queen and that she and the Royal Family are in our thoughts and prayers at this moment."
"If there is anything else, we will update the House accordingly," he added.
In a statement issued afterwards, Ms 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."
Labour leader Sir Keir Starmer said he is "deeply worried" by the news from Buckingham Palace and he is hoping for the Queen’s recovery. He tweeted: "Along with the rest of the country, I am deeply worried by the news from Buckingham Palace this afternoon.
"My thoughts are with Her Majesty the Queen and her family at this time, and I join everyone across the United Kingdom in hoping for her recovery."
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