The Queen has withdrawn from attending the funeral of the Duchess of Kent while she recovers from illness.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, had been 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 the President'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A Buckingham Palace spokesperson said: "With great regret, Her Majesty The Queen has withdrawn from attendance at this afternoon's Requiem M