King Charles Cancer Diagnosis | World Leaders Wish King Charles Speedy Recovery | UK News | N18V Prince Harry will return to the UK to meet his father UK’s king Charles after the latter was diagnosed with cancer. Buckingham Palace released a statement on Monday announcing that King Charles was diagnosed with cancer but did not specify what kind of cancer the monarch was suffering from.“During The King’s recent hospital procedure for benign prostate enlargement, a separate issue of concern was noted. Subsequent diagnostic tests have identified a form of cancer,” the Buckingham Palace said.