L'indépendance Luxembourgeoise - Crowds hail King Charles III as mourning begins for late queen

The smiling 73-year-old -- the oldest monarch to ascend to the throne -- shook hands and accepted flowers from well-wishers after returning to London from Scotland at the start of his reign.

One kissed his hand, another kissed his cheek, and some sang the national anthem, adapted to a new monarch following the passing of the 96-year-old Elizabeth after seven decades on the throne.

Church bells and ceremonial gun salutes rang out across the UK and Britain's overseas territories in honour of the late queen, who died "peacefully" at her beloved Balmoral retreat in Scotland after a year of ill-health.

Charles will make his first televised address as king at 6:00 pm (1700 GMT) before being formally proclaimed king to the public at 11:00 am Saturday morning.

Elizabeth II had reigned for a record-breaking 70 years, a source of stability in a period of extraordinary change whose death sparked heartfelt tributes from across the world.

"During this period of mourning and change, my family and I will be comforted and sustained by our knowledge of the respect and deep affection in which the queen was so widely held," Charles said in a statement on Thursday.

Buckingham Palace said the king and other members of the royal family would observe an extended mourning period from now until seven days after her funeral.

The date of the funeral, which will be attended by heads of state and government, has yet to be officially announced but is expected to be on Monday, September 19.

- World leader -

While Britons adjusted to the shock of the departure of their only head of state since the aftermath of World War II, tributes poured in for one of the planet's most recognisable people.

News of her death dominated global headlines, while the popular UK tabloid the Daily Mail declared: "Our hearts are broken."

Flowers were also left at British embassies around the world, including in Moscow -- currently at odds with London over the war in Ukraine.

Buckingham Palace in London became the epicentre for thousands of mourners, with flowers piling up in a sign of the reverence felt for the queen.

Joan Russell, a 55-year-old project manager from northeast London, had tears running down her cheeks as she looked at the tributes lining the gates.

"I think I came to say a prayer. She has been our monarch all my life and she has led by example, she has learnt, she has listened, wherever you go, she is our stamp," she told AFP.

"Charles has had such a great example to follow."

The new king was due to hold his first audience Friday with Prime Minister Liz Truss, who was only appointed on Tuesday in one of the queen's last official acts before her death.

Truss offered the nation's support to Charles as she said he now bore an "awesome responsibility" at the start of two days of special tributes to his mother in parliament.

"Even as he mourns, his sense of duty and service is clear," she said.

Truss lavished praise on the queen as "one of the greatest leaders the world has ever known".

"Her legacy will endure through the countless people she met, the global history she witnessed and the lives that she touched," the premier said.

Charles was also due to meet officials in charge of the arrangements for his mother's elaborate state funeral, which will take place before she is laid to rest in the King George VI memorial chapel at Windsor Castle.

Church bells tolled at Westminster Abbey, St Paul's Cathedral and at Windsor, among other places, and Union flags flew at half-mast across the UK.

Gun salutes -- one round for every year of the queen's life -- were fired Friday across Hyde Park in central London and from the Tower of London on the River Thames.

While the government has said there is no obligation on organisations to suspend business during the period of national mourning, many are doing so as a mark of respect.

The Premier League postponed all matches this weekend, the TUC umbrella body of trade unions postponed its congress due to begin on Sunday, while railway and postal workers halted upcoming strikes over pay, as Britain is gripped by soaring inflation and spiralling energy prices.

The queen's death and its ceremonial aftermath comes as the government strives to rush through emergency legislation to tackle the kind of war-fuelled economic privation that marked the start of Elizabeth's reign in 1952.

- Tearful tributes -

Elizabeth's public appearances had become rarer in the months since she spent an unscheduled night in hospital in October 2021 for undisclosed health tests.

She was seen smiling in her last official photographs from Tuesday when she appointed Truss as the 15th prime minister of her reign, which started with Winston Churchill in Downing Street.

But the queen, visibly thinner and stooped, leant on a walking stick. Her hand was also bruised dark blue-purple, sparking concern.

Jane Barlow, the photographer who took the last public pictures of the queen on Tuesday, said she was "frail" but in "good spirits".

The queen's closest family members had rushed to be at her bedside at Balmoral, a private residence set among thousands of acres (hectares) of rolling grouse moors and forests in the Scottish Highlands.

Her body is expected to remain there initially before being taken Sunday to the Palace of Holyroodhouse in Edinburgh.

From the Scottish capital, her coffin is due to be flown to London on Tuesday for a lying in state accessible to the public.

Officials expect more than one million people to file past the catafalque in Westminster Hall, the oldest part of the parliamentary complex, before the televised funeral service at Westminster Abbey opposite.

- Consistently popular -

Queen Elizabeth II came to the throne aged just 25 in the exhausted aftermath of World War II, joining a world stage dominated by political figures from Churchill to Mao Zedong and Joseph Stalin.

In the ensuing decades, the last vestiges of Britain's vast empire crumbled.

At home, Brexit shook the foundations of her kingdom, and her family endured a series of scandals.

But throughout, she remained consistently popular and was head of state not just of the United Kingdom but 14 former British colonies, including Australia and Canada.

The final public farewell at Westminster Abbey in London will be a public holiday in the form of a Day of National Mourning.

Charles's coronation, an elaborate ritual steeped in tradition and history, will take place in the same historic surroundings, as it has for centuries, on a date to be fixed.

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