The Enfield Poltergeist BBC Special

The Enfield poltergeist was a claim of supernatural activity at 284 Green Street, a council house in Brimsdown, Enfield, London, England, between 1977 and 1979.
The alleged poltergeist activity was centred on sisters Janet, aged 11, and Margaret Hodgson, aged 13.
The story attracted press coverage in British newspapers, has been mentioned in books, featured in television and radio documentaries, and dramatised in the 2016 horror film The Conjuring 2.