In March 1712, Hertfordshire resident 16-year-old Jane Wenham was condemned to death for witchcraft. She became known The Witch of Walkern after being found guilty of flying and speaking to Satan while in the shape of a cat. Aristocrat Earl Cowper came to her rescue and saved her from the gallows. This was the last time anyone was sentenced to death for witchcraft in Hertfordshire.
You can read the full story on the Welwyn Hatfield Times website: http://www.whtimes.co.uk/news/300_years_since_last_witch_was_saved_in_hertfordshire_1_1233346