A portrait of late Britain's Queen Elizabeth II is placed at White Monastery in Kathmandu on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on September 19 morning at Westminster Abbey. (Photo by PRAKASH MATHEMA / AFP)

People gather in Hyde Park where the State Funeral Service of Britain's Queen Elizabeth II will be shown on a large screen in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by JUSTIN TALLIS / AFP)

Members of the Royal British Legion Corps and Drums perform outside Westminster Abbey in London on September 19, 2022, ahead of the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

Police keep a close eye on proceedings during the funeral of Queen Elizabeth II at Westminster Abbey in London in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Adam Gerrard / POOL / AFP)

Carole Middleton (C-R) and Michael Middleton (C-L) arrive at Westminster Abbey in London on September 19, 2022, ahead of the State Funeral of Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Geoff PUGH / POOL / AFP)

Members of the Royal Navy march on the day of the state funeral and burial of Britain's Queen Elizabeth II, at Parliament Square in London, Britain, September 19, 2022 - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by SARAH MEYSSONNIER / POOL / AFP)

Members of the Royal marine band perform outside Westminster Abbey in London on September 19, 2022, ahead of the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

A woman waits with a large Paddington Bear as people gather in Hyde Park where the State Funeral Service of Britain's Queen Elizabeth II will be shown on a large screen in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by JUSTIN TALLIS / AFP)

People gather in Hyde Park where the State Funeral Service of Britain's Queen Elizabeth II will be shown on a large screen in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by JUSTIN TALLIS / AFP)

Guests take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Danny Lawson / POOL / AFP)

Members of the Royal Navy stand outside the Westminster Abbey, on the day of the state funeral and burial of Britain's Queen Elizabeth, in London, Britain, September 19, 2022. (Photo by HANNAH MCKAY / POOL / AFP)

Carole Middleton (C-R) and Michael Middleton (C-L) arrive at Westminster Abbey in London on September 19, 2022, ahead of the State Funeral of Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Ian Vogler / POOL / AFP)

Members of a military marching band walk outside the Westminster Abbey, on the day of the state funeral and burial of Britain's Queen Elizabeth, in London, Britain, September 19, 2022. (Photo by HANNAH MCKAY / POOL / AFP)

A woman walks past a screen showing portraits of late Queen Elizabeth II outside the residence of the British ambassador to Vietnam in Hanoi, on September 19, 2022. (Photo by Nhac NGUYEN / AFP)

Israel's President Isaac Herzog arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

The wife of Israel's President Michal Herzog arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

A member of a military marching band walks outside the Westminster Abbey, on the day of the State Funeral of Britain's Queen Elizabeth in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

People gather to watch the state funeral and burial of Britain's Queen Elizabeth, at Parliament Square in London, Britain, September 19, 2022. (Photo by SARAH MEYSSONNIER / POOL / AFP)

A general view of guest holding the Order of Service inside Westminster Abbey ahead of the State Funeral of Britain's Queen Elizabeth II in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Cattermole / POOL / AFP)

Guests arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

British food writer Tom Parker Bowles and family arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Tim Merry / POOL / AFP)

French President Emmanuel Macron (R) and his wife Brigitte Macron arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

French President Emmanuel Macron (R) and his wife Brigitte Macron arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

Brazil's President Jair Bolsonaro (R) and his wife Michelle Bolsonaro arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

French President Emmanuel Macron (R) and his wife Brigitte Macron arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

French President Emmanuel Macron (R) and his wife Brigitte Macron arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

Members of the Yeomen of the Guard march outside the Westminster Abbey, on the day of the State Funeral Britain's Queen Elizabeth II in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

Yeomen of the Guard march outside Westminster Abbey in London on September 19, 2022, ahead of the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

Yeomen of the Guard march outside Westminster Abbey in London on September 19, 2022, ahead of the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

Representatives from the Vatican arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

Yeomen of the Guard march outside Westminster Abbey in London on September 19, 2022, ahead of the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

Italy's President Sergio Mattarella (L) and his daughter Laura Mattarella arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

President of Israel Isaac Herzog and wife Michal Herzog arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Geoff PUGH / POOL / AFP)

A man stands beside a portrait of Britain's late Queen Elizabeth II at a jewellery shop in Srinagar on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on September 19 morning at Westminster Abbey. (Photo by TAUSEEF MUSTAFA / AFP)

A soldier walks along the Mall during the State Funeral Service of Britain's Queen Elizabeth II, in London on September 19, 2022,. - Leaders from around the world attended the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, was honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Odd ANDERSEN / AFP)

Members of a military marching band of the royal marines in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by ALKIS KONSTANTINIDIS / POOL / AFP)

Members of a military marching band of the royal marines in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by James Manning / POOL / AFP)

Members of the public playing cards in the crowd on The Mall ahead of the State Funeral of Queen Elizabeth II in central London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Martin Rickett / POOL / AFP)

People stand along the Long Walk outside Windsor Castle ahead of the State Funeral of Queen Elizabeth II in Windsor on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Alastair Grant / POOL / AFP)

People arrive with carts of flowers outside Windsor Castle as they wait for the coffin of Queen Elizabeth II to arrive in Windsor on September 19, 2022. (Photo by Alastair Grant / POOL / AFP)

Members of a military marching band walk at Parliament Square, on the day of the State Funeral of Britain's Queen Elizabeth II, in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by SARAH MEYSSONNIER / POOL / AFP)

US President Joe Biden (R) and First Lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

US President Joe Biden (R) and First Lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

US President Joe Biden (2ndR) and First Lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

A girl looks at a portrait of Britain's late Queen Elizabeth II at a jewellery shop in Srinagar on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on September 19 morning at Westminster Abbey. (Photo by TAUSEEF MUSTAFA / AFP)

People pet a police horse in London on September 19, 2022, as they gather to attend the procession to be held after the State Funeral Service of Britain's Queen Elizabeth II. - Leaders from around the world attended the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, was honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Odd ANDERSEN / AFP)

A police officer stands guard in London on September 19, 2022, prior to the procession to be held after the State Funeral Service of Britain's Queen Elizabeth II. - Leaders from around the world attended the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, was honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Odd ANDERSEN / AFP)

Former Director General of MI5 Andrew Parker (R) arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

US President Joe Biden (C) and First Lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

US President Joe Biden (R) and First Lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

French President Emmanuel Macron and his wife Brigitte Macron arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Fuller / AFP)

French President Emmanuel Macron and his wife Brigitte Macron arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Fuller / AFP)

French President Emmanuel Macron and his wife Brigitte Macron arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Fuller / AFP)

French President Emmanuel Macron and his wife Brigitte Macron arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Fuller / AFP)

A marching band performs ahead of the funeral service for Queen Elizabeth II in central London on September 19, 2022. (Photo by Emilio Morenatti / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Oli SCARFF / AFP)

Wellington Arch is pictured in London on September 19, 2022, prior to the procession to be held after the State Funeral Service of Britain's Queen Elizabeth II. - Leaders from around the world attended the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, was honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Odd ANDERSEN / AFP)

Christina Heerey, the final member of the public (4L) pays their respects at 06:29am, as they pass the coffin of Queen Elizabeth II, as it Lies in State inside Westminster Hall, at the Palace of Westminster in London on September 19, 2022. - Queen Elizabeth II will lie in state in Westminster Hall inside the Palace of Westminster, until 0530 GMT on September 19, a few hours before her funeral, with huge queues expected to file past her coffin to pay their respects. (Photo by Mark Large / POOL / AFP)

French President Emanuel Macron (R) and First Lady Brigitte Macron (L) arrive at the State Funeral of Queen Elizabeth II, held at Westminster Abbey in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by James Manning / POOL / AFP)

French President Emmanuel Macron (4L) and First Lady Brigitte Macron (3L) arrive at the State Funeral of Queen Elizabeth II, held at Westminster Abbey in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by James Manning / POOL / AFP)

Guests arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Danny Lawson / POOL / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

Empty vehicles travel down The Mall in London on September 19, 2022, ahead of the State Funeral Service of Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Paul ELLIS / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

US President Joe Biden and First Lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Cattermole / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

US President Joe Biden and First Lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Cattermole / POOL / AFP)

US President Joe Biden (R) exits a car outside the Westminster Abbey as he arrives for the State Funeral of Queen Elizabeth II at Westminster Abbey in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

Christina Heerey (3L), the final member of the public to pay their respects, leaves after passing the coffin of Queen Elizabeth II, as it Lies in State inside Westminster Hall, at the Palace of Westminster in London on September 19, 2022. - Queen Elizabeth II will lie in state in Westminster Hall inside the Palace of Westminster, until 0530 GMT on September 19, a few hours before her funeral, with huge queues expected to file past her coffin to pay their respects. (Photo by Mark Large / POOL / AFP)

Christina Heerey, the final member of the public to pay their respects, leaves after passing the coffin of Queen Elizabeth II, as it Lies in State inside Westminster Hall, at the Palace of Westminster in London on September 19, 2022. - Queen Elizabeth II will lie in state in Westminster Hall inside the Palace of Westminster, until 0530 GMT on September 19, a few hours before her funeral, with huge queues expected to file past her coffin to pay their respects. (Photo by Mark Large / POOL / AFP)

First Minister of Scotland Nicola Sturgeon (R) and her husband Chief Executive Officer of the Scottish National Party Peter Murrell arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

US President Joe Biden and first lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Cattermole / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

US First Lady Jill Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

A general view inside Westminster Abbey ahead of the State Funeral of Britain's Queen Elizabeth II in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Jack HILL / POOL / AFP)

Former British Prime Minister Theresa May arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

Former British Prime Minister Boris Johnson and his wife Carrie Johnson arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Cattermole / POOL / AFP)

US President Joe Biden arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

Guests arrive at Westminster Abbey ahead of the State Funeral of Britain's Queen Elizabeth II in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Cattermole / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

Guests arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Geoff PUGH / POOL / AFP)

Former British Prime Minister Tony Blair arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

Former British Prime Minister Theresa May arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

China's Vice President Wang Qishan (C) arrives ahead of the State Funeral of Queen Elizabeth II at Westminster Abbey in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Geoff PUGH / POOL / AFP)

Former British Prime Ministers Gordon Brown (L) and Tony Blair arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

Grenadier Guards march past the Elizabeth Tower, more commonly known as Big Ben in London on September 19, 2022, ahead of the State Funeral Service for Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by SARAH MEYSSONNIER / POOL / AFP)

Britain's Prince William, Prince of Wales and his family travel down The Mall in London on September 19, 2022, ahead of the State Funeral Service of Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Paul ELLIS / POOL / AFP)

Former British Prime Ministers Gordon Brown (L) and Tony Blair arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

Former British Prime Minister John Major arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

Britain's Prince William, Prince of Wales, and his children arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Odd ANDERSEN / POOL / AFP)

US President Joe Biden and First Lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Geoff PUGH / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Geoff PUGH / POOL / AFP)

China's Vice President Wang Qishan (C) arrives ahead of the State Funeral of Queen Elizabeth II at Westminster Abbey in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

US President Joe Biden and First Lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Frank Augstein / POOL / AFP)

A police sniper is seen on the roof of a building overlooking Parliament Square as crowds of well-wishers gather below for the Funeral of Her Majesty Queen Elizabeth II on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Joshua Bratt / POOL / AFP)

Police officers in formal attire stand near crowds of well-wishers that have gathered around Parliament Square ahead of the State Funeral of Queen Elizabeth II in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Joshua Bratt / POOL / AFP)

Cars part of US President Joe Biden and First Lady Jill Biden's convoy are seen outside the Westminster Abbey, on the day of the State Funeral of Queen Elizabeth II in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

Britain's former Prime Minister Boris Johnson and his wife Carrie arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by PHIL NOBLE / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Dominic Lipinski / POOL / AFP)

US President Joe Biden and first lady Jill Biden take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Fuller / POOL / AFP)

Britain's Prince William (L), Prince of Wales, and her daughter Britain's Princess Charlotte of Wales arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Odd ANDERSEN / POOL / AFP)

British Prime Minister Liz Truss arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

British Prime Minister Liz Truss (L) and her husband Hugh O'Leary arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

British Prime Minister Liz Truss arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

British Prime Minister Liz Truss arrives to take her seat at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Ben Stansall / AFP)

British Prime Minister Liz Truss arrives at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Marco BERTORELLO / AFP)

British Prime Minister Liz Truss arrives to take her seat at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Ben Stansall / AFP)

Britain's former Prime Minister Boris Johnson and his wife Carrie arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Dominic Lipinski / POOL / AFP)

Guests arrive to take their seats inside Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Dominic Lipinski / POOL / AFP)

Britain's former Prime Minister David Cameron and his wife Samantha arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by HANNAH MCKAY / POOL / AFP)

US President Joe Biden (C-L) accompanied by the First Lady Jill Biden (C-R) arrive for State Funeral of Queen Elizabeth II at Westminster Abbey in London on September 19, 2022. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by Gareth Fuller / POOL / AFP)

US President Joe Biden and first lady Jill Biden arrive at Westminster Abbey in London on September 19, 2022, for the State Funeral Service for Britain's Queen Elizabeth II. - Leaders from around the world will attend the state funeral of Queen Elizabeth II. The country's longest-serving monarch, who died aged 96 after 70 years on the throne, will be honoured with a state funeral on Monday morning at Westminster Abbey. (Photo by James Manning / POOL / AFP)