The Queen's coffin is in Edinburgh and is set to move to London, ahead of her state funeral on Monday 19 September.
Members of the public can still view her coffin at Edinburgh's St Giles' Cathedral, while the Queen will lie in state for four days at Westminster Hall from Wednesday.
King Charles III will also continue a tour of all four nations that make up the UK.
Here is your guide to what will happen, day by day.
The Queen's coffin will continue to lie at rest in St Giles' Cathedral. Officials say a queuing system will be in place for members of the public wishing to pay their respects.
At 17:00, the Queen's coffin will then be moved from St Giles' Cathedral to Edinburgh airport. Members of the public will be able to pay their respects as the hearse drives along the route.
The coffin will then travel by plane to RAF Northolt at 18:00. The Princess Royal, Princess Anne, will accompany her, and the coffin is expected to arrive in London shortly before 19:00.
The coffin will then be moved to Buckingham Palace, where it will be met by King Charles III and Camilla, Queen Consort, as well as other members of the Royal Family.
A guard of honour, formed by the King's Guard, will receive the coffin, before it is taken to the Bow Room, inside the palace, and watched over by a rota of chaplains.
Earlier in the day, the King and Camilla will fly to Belfast where King Charles will meet Secretary of State for Northern Ireland, Chris Heaton-Harris MP, as well as other party leaders. Upon arrival at Hillsborough Castle, the King and Queen Consort will do a short walkabout outside the gates to view floral tributes.
After a meeting with religious leaders, the King and Camilla will travel through Belfast city centre on route to a prayer service at St Anne's Cathedral. They will then return to London.
The coffin will be moved from Buckingham Palace to Westminster Hall, where the Queen will lie in state for four days. Lying-in-state describes the formal occasion in which a coffin is placed on view before the funeral ceremony.
The Queen's coffin will leave Buckingham Palace at 14:22. Crowds will be able to watch as the cortege makes the journey through central London – along Queen's Gardens, The Mall, Horse Guards and Horse Guards Arch, Whitehall, Parliament Street, Parliament Square and New Palace Yard.
The procession will include the King and members of the Royal Family, guns will be fired at Hyde Park and Big Ben will toll.
The coffin will be adorned with the Imperial State Crown and carried on a gun carriage of The King's Troop Royal Horse Artillery. The King and members of the royal family will walk behind in a journey taking 38 minutes.
The coffin will reach Westminster Hall at 15:00. Once there, it will rest on a raised platform. Each corner of the platform will be guarded 24-hours-a-day by soldiers from units that serve the Royal Household.
Members of the public will be able to pay their respects to the Queen's coffin from 17:00. Westminster Hall will remain open until 06:30 on Monday 19 September.
People are warned they may have to queue for hours, possibly overnight, with little opportunity to sit down as the queue will be continuously moving. Details of how you can attend and what you can and can't take in are here.
The day marks the first of four full days that the Queen's coffin will lie in state in Westminster Hall, where she will remain until the morning of the funeral.
It is expected that hundreds of thousands of mourners will pay their respects in the 11th-Century building, the oldest part of the Palace of Westminster and the heart of the British government.
The Queen's coffin will lie in state for the second full day in Westminster Hall, where people will be able to pay their respects.
The King and Camilla will travel to Wales, marking the final of his visits to all four nations of the United Kingdom as king.
The Queen's coffin will lie in state for the third full day in Westminster Hall.
The Queen's coffin will lie in state for the fourth full day in Westminster Hall.
A one minute silence will be held across the UK at 20:00. People can mark the silence privately in their own homes, on the street with neighbours or at community events and vigils.
Monday 19 September is the day of the Queen's state funeral. It will be a bank holiday in the UK.
The Queen's lying-in-state will end at 06:30. At 10.44, the coffin will be taken in procession from the Palace of Westminster to Westminster Abbey. The state funeral will begin at 11:00. Further details about the funeral are still to be confirmed.
Among the guests will be members of her family, senior UK politicians and heads of state from across the world, and representatives from the charities she supported.
Following the funeral, the coffin will travel in procession from Westminster Abbey to Wellington Arch, from where it will travel to Windsor.
The state hearse will then take the coffin along the Long Walk to St George's Chapel in Windsor Chapel, where a committal service will take place.
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