The Queen’s coffin is lying in state at Westminster Hall, ahead of her state funeral on Monday 19 September.
The hall is open 24-hours-a-day until Monday morning for members of the public to file past the coffin and pay their respects. Huge queues have formed along the banks of the River Thames.
People who wish to pay their respects virtually can watch a dedicated BBC live stream.
Here is your guide to what will happen, day by day.
Today is the first full day that the Queen’s coffin will lie in state in Westminster Hall, where she will remain until the morning of the funeral.
Hundreds of thousands of mourners are expected pay their respects in the 11th-Century building, the oldest part of the Palace of Westminster.
A huge queue has already formed and it could end up snaking along the South Bank, past the National Theatre, the Tate Modern and HMS Belfast, through to Southwark Park.
The UK government has published a live queue tracker for people to follow on YouTube. And if you…