?King Charles III will lead the Royal family in a procession behind the coffin of his mother when it travels to an Edinburgh cathedral to allow the public to pay their respects.
At 2.35pm on Monday, the late Queen's coffin will be driven 1,200 yards along Edinburgh's Royal Mile from the Palace of Holyroodhouse to the 14th century St Giles' Cathedral.
Her four children will follow, shoulder-to-shoulder, on foot, seen together in public for the first time since her death.
The King will on Monday morning address MPs and peers in Parliament's Westminster Hall - a decade after his mother did the same.
The new monarch will accept addresses of condolence from the House of Lords and the House of Commons, before making a speech in the historic 11th-century building.
The King will then embark on a tour of the United Kingdom, visiting Scotland, Wales and Northern Ireland.
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Members of the public wishing to pay their respects to the late Queen have been warned they could have to queue overnight to file past her coffin.
Elizabeth II will lie in state in the Palace of Westminster from 5pm on Wednesday evening until 6.30am on the morning of the funeral on Monday.
Her coffin will be placed on a raised platform, called a catafalque, in Westminster Hall - the oldest part of Parliament - and the public will be able to walk past 24 hours a day.
The coffin will also lie at rest in St Giles' Cathedral, Edinburgh, guarded by Vigils from The Royal Company of Archers, to allow the people of Scotland to pay their respects.
READ MORE: Where will Queen Elizabeth's body lie in state and how can I visit?
During his day in Edinburgh, the King will inspect the Guard of Honour at the Palace of Holyroodhouse, before attending the ceremony of the Keys on the forecourt.
At the Palace, the King will hold audiences with First Minister Nicola Sturgeon, followed by an audience with Alison Johnstone, the Presiding Officer of the Scottish Parliament.
Words of sympathy will be expressed by the Scottish Parliament when King Charles and and his wife Camilla, the Queen, attend to receive a motion of condolence, with the King replying.
King Charles III will lead the Royal family in a poignant procession behind the coffin of his mother when it travels to an Edinburgh cathedral to allow the public to pay their respects.
The Queen will be taken from the Palace of Holyroodhouse to nearby St Giles' Cathedral where her family, and a congregation drawn from all areas of Scottish society, will attend a service of thanksgiving for her life.
Full details about the royal mourners have yet to be released but there is speculation the Duke and Duchess of Sussex and the new Prince and Princess of Wales will be part of the group.
The King will lead some of the royals on foot, expected to be the Duke of York, Earl of Wessex, Princess Royal and her husband Vice Admiral Sir Tim Laurence - while the Queen Consort and other members of the monarchy will follow in cars.
Members of the public will be able to view the coffin to pay their respects for 24 hours before it is taken to London ahead of a period of lying in state.
Later in the evening, the King and other members of his family, likely his siblings, will mount a vigil at the cathedral in honour of their mother.