Watch: Queen Elizabeth II - day-by-day guide of events from now to the funeral
The Queen is currently lying in state, with tens of thousands lining the banks of the Thames to pay their respects.
Members of the public can visit Her Majesty's coffin for 24 hours a day at Westminster Hall, with queues stretching along Lambeth Bridge and Albert Embankment.
On Sunday morning the queue waiting time was more than 12 hours – far shorter than the peak of more than 25 hours that was seen in the early hours of Saturday morning.
The Queen’s coffin is guarded at all hours by units from the Sovereign’s Bodyguard, the Household Division or Yeoman Warders of the Tower of London.
On Saturday, the King and the Prince of Wales surprised people in the queue when they showed up to greet them.
Prince William later joined his brother the Duke of Sussex and their cousins in a solemn vigil at the Queen’s lying in state.
Here is what will happen today and during the funeral tomorrow.
The Queen will lie in state for a fourth full day.
At 8pm a one-minute silence will be held across the UK, with people invited to mark the occasion privately at home, on their doorstep or street, or at community events and vigils.
It will come shortly after the Queen Consort pays a televised tribute to the late monarch, recalling her "wonderful blue eyes" and saying: "I will always remember her smile."
Camilla, in pre-recorded words on the BBC, will speak of how Queen Elizabeth II was a “solitary woman” in a male-dominated world.
She will add: "I can't remember anyone except the Queen being there."
There will also be a service of reflection near Falkirk, Scotland at 7.30pm.
It will see 96 lanterns, one for each year of the late monarch’s life, lowered into the pool of reflection at the foot of the Queen Elizabeth II Canal, before wreaths are placed into the water.
Meanwhile, Liz Truss is to have an audience with King Charles III before attending his reception for visiting heads of state at Buckingham Palace.
There will be a national bank holiday to allow as many people as possible to watch the Queen’s funeral.
Lying in state will continue until 6.30am.
The coffin will then be taken in a grand military procession from the Palace of Westminster to Westminster Abbey for the state funeral.
Senior members of the family are expected to follow behind – just like they did for the funeral of Diana, Princess of Wales and the Duke of Edinburgh.
The military will line the streets and join the procession.
Heads of state, prime ministers and presidents, European royals and key figures from public life will be invited to gather in the abbey, which can hold a congregation of 2,000.
The congregation will be able to start taking their seats from 8am, when the doors of Westminster Abbey will open.
The service, that begins at 11am, will be televised, and a national two minutes’ silence is expected to be held.
After the service, which is expected to last for one hour, the coffin will be taken in procession from Westminster Abbey to Wellington Arch and then travel for two hours to Windsor.
On its way out of the capital, the procession is set to travel west along the south end of Hyde Park before passing the Queen’s gate and heading along Cromwell Road.
It will then travel through Hammersmith and Chiswick, along the north bank of the River Thames, before heading down the Great West Road.
The Queen’s coffin will then be driven south of Heathrow Airport and will pass through Staines before entering the grounds of Windsor Castle through Shaw Farm Gate.
The slower route, sticking to A-roads rather than motorways, will give supporters of the Royal Family one last chance to say goodbye to the monarch.
Once there, the hearse will travel in procession to St George’s Chapel at Windsor Castle via the Long Walk, after which a televised committal service will take place at 4pm in St George’s Chapel.
Later in the evening, there will be a private interment service with senior members of the royal family.
The Queen’s final resting place will be the King George VI memorial chapel, an annex to the main chapel – where her mother and father were buried, along with the ashes of her sister, Princess Margaret.
Philip’s coffin will move from the Royal Vault to the memorial chapel to join the Queen’s.