King Charles has given a rare health update as he continues his brave battle with cancer .

RadarOnline.com can reveal the monarch, 76, told a fellow cancer patient, "I'm not too bad", when asked about his recovery during a visit to open a new hospital in the U.K . Article continues below advertisement

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In a separate meeting, Charles joked he was also discovering that "bits don't work so well once you get past 70."

The King has been undergoing cancer treatment since January last year.

Buckingham Palace has not confirmed what type of cancer he has, but it is understood not to be prostate.

Charles’ cancer update comes as the frail royal prepares to meet son Prince Harry face-to-face for the first time since February. Article continues bel

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