London, Dec. 13 -- Britain's King Charles III has shared a rare update on his cancer journey, saying his treatment has progressed well and will be scaled back in the new year, marking what he described as a significant moment in his recovery.

In a pre-recorded video message for Channel 4's Stand Up To Cancer broadcast, the 77-year-old monarch said the development was "a personal blessing" and praised "the remarkable advances that have been made in cancer care in recent years."

"Today I am able to share with you the good news that thanks to early diagnosis, effective intervention and adherence to 'doctor's orders,' my own schedule of cancer treatment can be reduced in the new year," the King said in the message.

King Charles disclosed h...