So there's a tiny uninhabited island off the coast of Kent called Deadman's Island where the coffins and remains of prisoners buried 200 years ago are exposed when the tide goes out, and this sounds like complete fiction and it's not.

CW: human bones https://www.bbc.co.uk/news/av/uk-england-kent-38775569/deadman-s-island-reveals-the-grisly-history-of-kent

Naturally there is Folklore about this dismal place: a brain-snatching monster, hounds with glowing red eyes that eat the heads of the dead, eerie howls in the middle of the night that sound nothing like the wind

Strangely enough, Kent has a bit of previous when it comes to islands and death https://twitter.com/Cavalorn/status/959368937044660224

TANGENT: if you listen to the song just tweeted, which of course comes from Treasure Island, you will hear the lyric 'the skipper lay with his nob in gore', because in years past 'nob' was slang for 'head'.

Unfortunately some people not from the UK are not aware that 'nob' now has other, quite different, slang meanings & thus it was that there was once Doctor Who fan fiction in which Rose innocently points out that the Tenth Doctor 'has hair gel all over his nob'

ANYWAY back to Deadman's Island. Here is the entire BBC Inside Out feature. https://www.bbc.co.uk/programmes/p04rf50l