”The King of Gorse” by Paul Draper

"The King of Gorse" is a short story by the British author, Paul Draper. The story appeared in Draper's 2020 collection, Black Gate Tales. In the author's own words: “A rural doctor discovers that a small girl under the influence of a mild narcotic has unwittingly invited an ancient evil into the village."

Black Gate Tales: https://www.amazon.co.uk/dp/1999663012