King and Queen Consort arrive at Westminster Hall
King Charles and the Queen Consort have arrived at Westminster Hall, where the monarch is expected to address parliament.
They will hear messages of condolences from Britain's prime minister and other politicians.
Yeomen of the Guard arrive at Houses of Parliament
Westminster Hall lends historic significance to Charles' speech
In one of the main events for today, Charles and Camilla will visit Westminster Hall at 10 a.m. local time (5 a.m. ET) to receive condolences from Prime Minister Liz Truss, as well as members of the House of Commons and the House of Lords. Charles will then deliver a speech to Parliament.
Westminster Hall is home to both Houses of Parliament and was built in 1097, making it the oldest existing building on what's known as the Parliamentary Estate. The building was originally part of the Palace of Westminster, which served as the main residence for the English monarch until the reign of King Henry VIII.
The majority of the palace was lost to a fire in 1834, but the hall was spared thanks to the work of firefighters and the changing of the direction of the wind that night. The palace was also hit by bombs twice during World War II, but the hall survived.
The queen's coffin will move on Wednesday from Buckingham Palace to Westminster Hall, where she will lie in state until her funeral on Monday. The hall will remain open for 24 hours during that time so that the public can pay their respects.
King Edward VII was the first monarch to lie in state there. After her death in 2002, Queen Elizabeth, the Queen Mother, was the most recent royal to do so. Prince Philip requested to not be given a state funeral.
Royal Parks ban mourners from bringing gifts, teddy bears
Mourners hoping to pay tribute to the queen will not be able to do so with gifts such as teddy bears and balloons, according to the Royal Parks, the charity that manages royal parklands in London.
Tributes to the queen that are not flowers will not be allowed at Green Park next to Buckingham Palace, the authority announced on its website. Cards and labels, meanwhile, will be permitted but will be periodically cleared away.
The lighting of candles for the queen will also not be permitted.
Burj Khalifa lit up with portrait of queen
The Burj Khalifa, the world's tallest building, was lit up Sunday night with a portrait of the queen superimposed onto the British Union Jack national flag.
Brazil's Bolsonaro to attend queen's funeral
Brazil's President Jair Bolsonaro has accepted his invitation to attend the queen's funeral next week.
Bolsonaro will join other world leaders in London for the proceedings on September 19.
Prince Harry releases statement in memory of his 'Granny'
Prince Harry released a statement Monday celebrating the life of his grandmother and honoring her "unwavering grace and dignity."
"In celebrating the life of my grandmother, Her Majesty The Queen — and in mourning her loss — we are all reminded of the guiding compass she was to so many in her commitment to service and duty," he said.
"Granny, while this final parting brings us great sadness, I am forever grateful for all of our first meetings — from my earliest childhood memories with you, to meeting you for the first time as my Commander-in-Chief, to the first moment you met my darling wife and hugged your beloved great grandchildren," the statement later continued. "I cherish these times shared with you, and the many other special moments in between."
"You are already sorely missed, not just by us, but by the world over. And as it comes to first meetings, we now honour my father in his new role as King Charles III."
"Thank you for your commitment to service.
Thank you for your sound advice.
Thank you for your infectious smile.
We, too, smile knowing that you and grandpa are reunited now, and both together in peace."
Clarence House social media accounts retired
The Clarence House social media accounts for King Charles and the queen consort have been retired.
Social media pages for Clarence House, the London residence of the now-former Prince of Wales and Duchess of Cornwall, were updated with the message: "This account is no longer being updated.
"Please follow @theroyalfamily for updates on His Majesty King Charles III and Her Majesty The Queen Consort."
The Clarence House Twitter account had around 1.1 million followers as of early Monday morning, while the Instagram page had around 1.7 million followers.
New Zealand PM say country has no immediate plans to become a republic
New Zealand's Prime Minister Jacinda Ardern has said her government will not discuss plans to remove the British monarch as her country's head of state following the death of the queen.
“This is a large, significant debate. I don’t think it’s one that would or should occur quickly,” Ardern said on Monday.
The prime minister, however, said she believed New Zealand would eventually become a republic, perhaps in her lifetime, but said there are other more pressing issues to be considered for the time being.
Ardern will join other world leaders this week to attend the queen's funeral.