Royal fans have been left heartbroken by a new update on King Charles’ cancer battle revealed by a source close to the family.
King Charles has faced a major health battle since Buckingham Palace announced his cancer diagnosis in February 2024.
More than two years later, the monarch continues to receive treatment while maintaining a demanding schedule of royal duties.
However, fresh reports have now raised new concerns about the 77-year-old King’s health, with claims that he remains in a fragile condition.
The reports come during another turbulent period for the royal family, with controversy surrounding Charles Spencer’s new book and renewed attention on Prince Harry and Meghan Markle.
King Charles’ cancer battle
King Charles’ health problems first became public in January 2024, when he was admitted to the London Clinic for treatment for an enlarged prostate.
Buckingham Palace later revealed that doctors had discovered another medical issue during the procedure.
On February 5, 2024, the Palace announced that diagnostic tests had identified “a form of cancer.”
The statement explained that Charles had begun regular treatment and had temporarily postponed public-facing duties on medical advice.
Despite stepping back from some official engagements, the monarch continued dealing with state business and paperwork.
The Palace also said Charles was “wholly positive” about his treatment and looked forward to returning to his full public schedule.
Importantly, Buckingham Palace did not publicly identify the type or stage of cancer.
The King chose to disclose the diagnosis himself through the Palace, with officials saying he hoped his decision could help prevent speculation and raise awareness among others affected by cancer.
Charles subsequently returned to public duties as his treatment continued.
By December 2025, there appeared to be more encouraging news surrounding his recovery.
The King described a reduction in the frequency of his cancer treatment as a “milestone” in his cancer journey.
His treatment was expected to move into a precautionary phase, with medical professionals continuing to assess his recovery and determine how long treatment would remain necessary.
Charles has also continued carrying out a substantial number of official engagements.
According to an analysis of the Court Circular, he completed official duties on 164 days during the 12 months leading up to September 2026.
Those responsibilities have continued alongside his cancer treatment, showing how much of his working schedule he has maintained despite his diagnosis.
The King has been in the news recently
The King’s health concerns have emerged at a particularly complicated time for the wider royal family.
One of the latest controversies involves Charles Spencer, the younger brother of the late Princess Diana.
Spencer’s new memoir has attracted considerable attention because of claims concerning Diana, her relationship with Charles, and events following her death.
One of the most contentious allegations concerns an alleged conversation between Spencer and the then Prince Charles shortly after Diana died in 1997.
According to Spencer’s account, Charles allegedly told him that people would forget about Diana “soon enough.”
Buckingham Palace strongly disputed the recollection.
A Palace source suggested that Spencer’s memory may have been affected by the grief surrounding his sister’s death, saying that “the pain of fraternal grief can cloud reason, affect judgment and colour memory in ways others do not recognise.”
Spencer has stood by his recollection, creating an unusual public dispute between Diana’s brother and the institution headed by the man who was once her husband.
The book has faced another controversy in recent days after Spencer acknowledged a factual error.
He admitted that he had got a date wrong in the book but said he would not withdraw it from sale.
The error also prompted a legal threat from broadcaster Piers Morgan, who reportedly demanded action over the disputed material.
The controversy has therefore placed renewed attention on Charles, Diana’s legacy, and the difficult history surrounding the royal family.
Prince Harry and Meghan Markle add to family tensions
The latest concerns surrounding King Charles have also emerged alongside renewed developments involving Prince Harry and Meghan Markle.
The Duke and Duchess of Sussex returned to the UK with their children in 2026, putting their relationship with the wider royal family under renewed scrutiny.
Harry has also continued making public appearances in Britain.
In September, he attended the WellChild Awards in London without Meghan, marking another public appearance following the family’s return to the UK.
Meghan remained focused on helping their children settle into life in Britain, according to reports.
Their return has also coincided with another important development in their relationship with the monarchy.
On September 7, King Charles formally reiterated that Harry and Meghan remain non-working royals.
Reports indicated that the couple were surprised by the timing of the communication and had received limited notice before the information reached the media.
The situation has continued to fuel speculation about the relationship between Harry, his father, and Prince William.
However, reports about the brothers’ relationship should be treated carefully, particularly when they rely on unnamed sources rather than official statements.
What is clear is that Harry remains involved in charitable work in Britain, while his relationship with the royal institution remains significantly different from before he stepped down as a working royal.
For Charles, the continuing family tensions come while he remains responsible for a substantial schedule as monarch.
Heartbreaking update on King Charles’ health
The latest concerns emerged in a report published by The News International on September 12.
The publication cited RadarOnline and unnamed royal sources who claimed that Charles’ health was deteriorating and that the monarch remained extremely fragile.
The royal source said, “Charles is still extremely fragile due to his illness, and this toxic situation between his sons is only making matters worse.
“No wonder he’s collapsing under the strain of it all. Literally, too – in one photo, it actually looks like he’s keeling over!”
“The palace is keen to project a positive image, briefing everyone that he’s making great strides in his recovery and that there’s no cause for alarm,” another source revealed.
“But behind the scenes, there’s little doubt things are pretty bleak.”
Those claims have not been independently confirmed by Buckingham Palace.
The distinction is important because the Palace has previously provided more encouraging information about Charles’ cancer treatment.
In December 2025, officials indicated that his treatment was being reduced as his recovery reached what was described as a positive stage.
More recent reporting has nevertheless continued to describe Charles as vulnerable while he balances his medical treatment with the demands of being monarch.
Another report published earlier in September claimed that people close to Charles remained concerned about his energy levels and the amount of stress surrounding him.
That report also linked those concerns to the ongoing tensions involving Harry and William, although those claims again came from unnamed sources rather than an official medical statement.
The latest report therefore adds another layer to the uncertainty surrounding Charles’ health.
