The King and Queen Consort have left Balmoral and boarded a flight to London at Aberdeen Airport.
Charles had travelled to the Aberdeenshire castle to be by his mother’s side before her death on Thursday afternoon.
The King will travel to London where he will meet with Prime Minister Liz Truss before he is expected to address the nation later on Friday.
The day the monarch dies is traditionally known as Day of Death – or D-Day or D+0 – under plans codenamed London Bridge.
But because the announcement from Buckingham Palace was made late – around 6.30pm on Thursday, September 8 – the plans have been shifted to allow complicated arrangements to be made.
That means Friday, September 9 will be considered D-Day.
After his meeting with the new Prime Minister, it is likely he will meet the Duke of Norfolk – who’s in charge of the accession and the Queen’s funeral.