The Queen has withdrawn from attending the funeral of the Duchess of Kent while she recovers from illness.
Buckingham Palace said on Tuesday that Queen Camilla is recovering from acute sinusitis.
Camilla, 78, was due to join the King and other members of the Royal Family at the funeral at Westminster Cathedral this afternoon.
The withdrawal raises questions over her attendance for US President Donald Trump's state visit, which begins at Windsor on Wednesday.
The visit is being hosted by King Charles.
But the Queen is hopeful she will recover in time to attend all royal elements of Mr Trump's trip, which includes a lavish state banquet.
A Buckingham Palace spokesperson said: "With great regret, Her Majesty The Queen has withdrawn from attendance at this afternoon's Requiem Mass for The Duchess of Kent as she is recovering from acute sinusitis."
The Duke of Kent has been informed and is said to fully understand the decision, wishing her a speedy recovery.
The Queen had travelled down from Scotland this morning and is currently travelling to Windsor, where she will rest.
"Her thoughts and prayers will be with The Duke of Kent and all the family."
The requiem mass, which is a Catholic funeral, is the first to be held for a member of the monarchy in modern British history.
Royals in attendance included Prince William, Catherine, the Princess of Wales, the Princess Royal and her husband, Vice Admiral Sir Tim Laurence.
Prince Andrew and Sarah Ferguson, the Duchess of York, were also seen approaching Westminster Cathedral for the service.
Former Formula One world champion Sir Jackie Stewart and actresses Rula Lenska and Dame Maureen Lipman were also among the mourners.
Katharine, the Duchess of Kent, who became the oldest living member of the Royal Family when Queen Elizabeth II died in 2022, died at the age of 92 on 4 September.
(c) Sky News 2025: Queen pulls out of attending Duchess of Kent's funeral due to illness, Buckingham Palace says
Ricky Hatton's ex-girlfriend Claire Sweeney pays tribute after boxer's death
Heavy security at Windsor for Trump's state visit feels 'American'
Google makes £5bn pledge to Britain - but concerns raised over mooted UK-US tech deal
Former Tory minister Maria Caulfield defects to Reform UK
Britain's drugs industry is suffering withdrawal symptoms, and it could prove costly
State pension likely to rise by 4.7% after latest figures
Surge in the price of matcha as global demand soars, with US sales up by 86%
'African tribe' evicted from Scottish woodland site but set up new camp nearby
Alistair Wilson murder: 'Significant amount' of police work carried out on unsolved doorstep shooting
