The Queen has been forced to delay a virtual meeting of the Privy Council, which was due to be held on Wednesday, on medical grounds.
DISCOVER: The Queen's 15 Prime Ministers: From Winston Churchill to new leader Liz Truss
The 96-year-old monarch had a busy Tuesday in which she accepted the resignation of prime minister Boris Johnson before appointing Liz Truss as his successor. In a statement, a Buckingham Palace spokesman said: "After a full day yesterday, Her Majesty has this afternoon accepted doctors’ advice to rest."
WATCH: The Queen's health over the years
"This means that the Privy Council meeting that had been due to take place this evening will be rearranged."
MORE: The Queen sends fans into overdrive as she lists postcard-worthy private home on Airbnb
SEE: The Queen: Royal fans spot unusual detail in new Balmoral photo
The virtual meeting would have seen the new prime minister take her oath as First Lord of the Treasury as well as members of the Cabinet accepting their positions; those who weren't already members of the Privy Council would be appointed to it.
The Queen will be remaining at Balmoral Castle and she will not be required to stay at hospital.
During Tuesday, the new prime minister was late in arriving for her audience with the monarch, which was due to start at 12.10pm.
The Queen had a busy Tuesday
Ms Truss's plane had a difficult landing at Aberdeen Airport due to adverse weather conditions which slightly impacted the day's schedule.
In a statement, Buckingham Palace later confirmed: "The Queen received in audience The Right Honourable Elizabeth Truss MP today and requested her to form a new administration.
LOOK: The Queen's Balmoral living room has barely changed in nearly 50 years – see photos
DISCOVER: What really happened inside the Queen's meeting with Liz Truss
"Ms Truss accepted Her Majesty’s offer and kissed hands upon her appointment as Prime Minister and First Lord of the Treasury."
Prior to meeting with the new premier, the Queen spent time privately with Boris Johnson, as he formally tendered his resignation as Prime Minister and First Lord of the Treasury, which Her Majesty was "graciously pleased to accept".
Make sure you never miss a ROYAL story! Sign up to our newsletter to get all of our celebrity, royal and lifestyle news delivered directly to your inbox.
