Photos: Queen Elizabeth is escorted from Buckingham Palace to lie in state at Westminster Hall

Life Guards, top left, and Blues and Royals, top right, units of the Household Cavalry, and Household Division Foot Guards prepare at Buckingham Palace ahead of a procession of the coffin of Queen Elizabeth II from Buckingham Palace to Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (Daniel Leal/Pool Photo via AP)

Members of the King's Troop Royal Horse Artillery leave Wellington Barracks, ahead of the ceremonial procession of the coffin of Queen Elizabeth II from Buckingham Palace to Westminster Hall. (Ben Birchall/Pool via AP)

Britain's King Charles III, Princess Anne , Prince Andrew and Prince Edward follow the coffin of Queen Elizabeth II during a procession from Buckingham Palace to Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (AP Photo/Christophe Ena, Pool)

Grenadier Guards flank the coffin of Queen Elizabeth II during a procession from Buckingham Palace to Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (AP Photo/Kirsty Wigglesworth)

Britain's King Charles III, left, and Princess Anne follow the coffin of Queen Elizabeth II during a procession from Buckingham Palace to Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (AP Photo/Kirsty Wigglesworth)

Members of the Grenadier Guards, the King's Troop Royal Horse Artillery and other Armed Forces flank the coffin of Queen Elizabeth II during a procession from Buckingham Palace to Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (AP Photo/Kirsty Wigglesworth)

Britain's King Charles III and Prince William, Prince of Wales walk behind the coffin of Queen Elizabeth II, during a procession from Buckingham Palace to Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (Daniel Leal/Pool Photo via AP)

Senior members of the British Royal Family follow behind the coffin of Queen Elizabeth II during a procession from Buckingham Palace to Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (AP Photo/Kirsty Wigglesworth)

Britain's Prince William and Prince Harry follow the coffin of Queen Elizabeth II during a procession from Buckingham Palace to Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (AP Photo/Vadim Ghirda, Pool)

King Charles follows the coffin of Queen Elizabeth II, during a procession from Buckingham Palace to Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (AP Photo/Alberto Pezzali)

The coffin of Queen Elizabeth II is carried into Westminster Hall for the lying in State. (Dan Kitwood/Pool via AP)

The procession of the coffin of Britain's Queen Elizabeth II moves from Buckingham Palace to the Houses of Parliament for her lying in state. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (Toby Melville/Pool via AP)

King Charles Camilla, Queen Consort, Princess Anne, Prince Edward, Prince William, Prince Andrew, Tim Laurence, Peter Phillips, Sophie, Countess of Wessex, Catherine, Princess of Wales, Princess Beatrice are seen inside the Palace of Westminster as the First Watch begins their duty during the lying in State of Queen Elizabeth II. (Dan Kitwood/Pool via AP)

The coffin of Queen Elizabeth II is placed at Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (AP Photo/Nariman El-Mofty, Pool)

Prince Harry and Meghan Duchess of Sussex, Prince William, and Kate, Princess of Wales leave Westminster Hall. The Queen Elizabeth II will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (AP Photo/Nariman El-Mofty, Pool)

King Charles and Camilla, the Queen Consort leave Westminster Hall. The Queen Elizabeth II will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (AP Photo/Nariman El-Mofty, Pool)

Edoardo Mapelli Mozzi and Princess Beatrice pay their respects to Queen Elizabeth II as the coffin rests in Westminster Hall for her Lying-in State. (Christopher Furlong/Pool Photo via AP)

Britain's Prime Minister Liz Truss walks as the procession with the coffin of Britain's Queen Elizabeth arrives at Westminster Hall. The Queen will lie in state in Westminster Hall for four full days before her funeral on Monday Sept. 19.  (Phil Noble/Pool Photo via AP)