Article continues below advertisementKing Charles' latest message about his cancer recovery has been praised as a "heroic call to action," with experts and former royal staff telling OK! it reflects a remarkable new openness from the monarch - and a modern shift in how the royal family connects with the public.The 77-year-old King shared the encouraging update during a video message released on December 12 for Channel 4's Stand Up To Cancer campaign.Article continues below advertisementSource: MEGAKing Charles is reportedly showing 'new openness.