The eight grandchildren of Britain's Queen Elizabeth mounted a vigil around her coffin on Saturday, hours after King Charles III and Prince William staged an unscheduled London walkabout to thank those queueing overnight to pay their last respects.
Prince William and his brother Prince Harry led the 15-minute vigil inside parliament's Westminster Hall, which has hosted tens of thousands of mourners since the late queen began lying in state there on Wednesday.
The grandchildren, aged from 44 to 14, stood silently with their eyes lowered as members of the public filed past.
Prince Harry - who served two tours with the British Army in Afghanistan - wore his military uniform, despite no longer being a working royal, after being given special permission by his father.
The move appeared to be the latest olive branch offered by King Charles towards his youngest son after Harry and his wife Meghan, now living in California, accused the royal family of racism.
An impromptu walkabout by the king and his eldest son William earlier delighted mourners who had queued all night to see Queen Elizabeth's coffin before Monday's state funeral.
Cries of "God save the king" came from the riverside crowd as the royals thanked the well-wishers waiting patiently in line, before Charles went on to meet some of the many world leaders arriving for Monday's funeral.
Tens of thousands of people are braving waits that have stretched to more than 25 hours to view the queen’s coffin.
Britain's biggest-ever security operation
The sombre occasion was briefly disrupted late on Friday when a man burst out of the line and approached the coffin, which sits topped with the Imperial State Crown.
But otherwise, the mood remained reverential on Saturday as people walked slowly past the catafalque, bowing their heads, clasping their hands in prayer, or saluting in the case of some veterans wearing medals.
Some 435 people in the queue have needed medical treatment, often for head injuries after fainting, the London Ambulance Service said.
Police are mounting Britain's biggest-ever security operation for Monday's funeral, with hundreds of dignitaries including US President Joe Biden set to jet in and mourners already setting up camp in front of Westminster Hall and Buckingham Palace for the final goodbye.
Less than two weeks since she was appointed by the late queen, British Prime Minister Liz Truss was on Saturday beginning a packed series of meetings with world leaders including New Zealand counterpart Jacinda Ardern and Australia's pro-republic PM Anthony Albanese.
Ardern, Albanese and Canadian Prime Minister Justin Trudeau were among leaders who paid their own respects at Westminster Hall.
They later held one-to-one talks with their new king as he received leaders of the Commonwealth realms - the 14 countries over which he now reigns in addition to the United Kingdom - at Buckingham Palace.
From Australia and Canada to Jamaica and Papua New Guinea, they have formally proclaimed him their new sovereign.
But republican movements are gaining ground in many of the countries, and efforts to keep them all in the royal fold will likely be a feature of his reign.
President Biden is expected to visit Westminster Hall on Sunday.
'Tide of emotion'
After visiting Wales on Friday, Charles joined a 15-minute vigil with his siblings - Princess Anne, Prince Andrew and Prince Edward - around their mother's casket.
Her granddaughters Princesses Beatrice and Eugenie, who were part of Saturday's vigil, paid a heartfelt tribute to "our dearest Grannie".
"We, like many, thought you'd be here forever," the sisters said. "And we all miss you terribly.
The public have until 6.30am on Monday to view the coffin.
The funeral ceremony at Westminster Abbey - expected to be watched by billions around the globe - will see 142 sailors pulling the gun-carriage bearing her lead-lined coffin.
It will be attended by more than 2,000 guests, but leaders from countries at loggerheads with the UK such as Russia, Belarus and Afghanistan have not been invited.
China's vice president Wang Qishan will attend, Beijing's foreign ministry confirmed, after a diplomatic spat saw Chinese officials barred from visiting the coffin inside parliament.
Some 800 people, including members of the Queen's Household and Windsor estate staff, will attend the private committal burial service afterwards at 4pm in St George's Chapel, Windsor Castle.
After the funeral, the king and members of the royal family will walk behind the queen's coffin to Wellington Arch when it leaves Westminster Abbey, before it is driven to Windsor on the state hearse.
