Frail King Charles is said to be "shaken to the core" over fears a huge panther-like predator has been stalking the grounds around Highgrove House, the Gloucestershire estate he shares with Queen Camilla .

RadarOnline.com can reveal the 76-year-old monarch, who insiders tell us is losing his battle against cancer , was warned of a sighting near the royal residence in Tetbury after a dog walker reported seeing a black panther cornering a fox at dusk. The animal was only driven away when the walker's dogs startled it, leaving the fox to escape unharmed – and locals have dubbed it "The Beast of Highgrove." Article continues below advertisement

A Black Panther Appears

A local source said: "The King takes enormous comfort in the countryside, and Highgrove is his sanctuary; the idea

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