The King has been diagnosed with cancer and has started treatment today, Buckingham Palace has announced.
The diagnosis comes following treatment for an enlarged prostate, although the palace says he does not have prostate cancer.
The palace has not confirmed what type of cancer the 75-year-old monarch has.
A palace spokesperson says: “His Majesty has been treated for benign prostate enlargement.
“It was during this intervention that the separate issue of concern was noted and subsequently diagnosed as a form of cancer.
“This second condition will now receive appropriate treatment.”
The monarch has been advised by doctors to pause any public-facing duties.
Yesterday, the King was photographed waving after he and the Queen attended a church service in Sandringham, Norfolk.
A statement from Buckingham Palace said on Monday: “The King is grateful to his medical team for their swift intervention, which was made possible thanks to his recent hospital procedure.
“He remains wholly positive about his treatment and looks forward to returning to full public duty as soon as possible.
“His Majesty has chosen to share his diagnosis to prevent speculation and in the hope it may assist public understanding for all those around the world who are affected by cancer.”
The King travelled from Sandringham to London this morning to begin treatment as an outpatient. He is at home in London this evening.
This breaking news story is being updated and more details will be published shortly.
Please refresh the page for the fullest version.