King Charles III has been diagnosed with cancer, Buckingham Palace has confirmed.

The King has been diagnosed with a form of cancer and has begun a schedule of regular treatments, and while he has postponed public duties he “remains wholly positive about his treatment”, Buckingham Palace said.

The diagnosis comes after the 75-year-old monarch was recently admitted to hospital because of an enlarged prostate, although the palace says he does not have prostate cancer.

In a briefing, the Palace said: “His Majesty has been treated for benign prostate enlargement. It was during this intervention that a separate issue of concern was noted and subsequently diagnosed as a form of cancer. This second condition will now receive appropriate treatment.

“No further details are being shared at this stage, but His Majesty is receiving expert care and looks forward to returning to full public duty as soon as possible.”

The briefing note added: “His Majesty is grateful to his medical team for their expert care and swift intervention, is wholly positive about his treatment and looks forward to returning to full public duty as soon as possible.”

At that time, the Palace told the public: “In common with thousands of men each year, the King has sought treatment for an enlarged prostate.

“His Majesty’s condition is benign, and he will attend hospital next week for a corrective procedure. The King’s public engagements will be postponed for a short period of recuperation.”

The King was eventually discharged after spending three nights in a Central London hospital.

Following his stay at the medical facility, a spokesman said: “The King was this afternoon discharged from hospital following planned medical treatment and has rescheduled forthcoming public engagements to allow for a period of private recuperation.”

Sources close to the Royal Family praised The London Clinic for the security measures put in place during Charles and Kate Middleton's stay.