The Thornton Heath Poltergeist became famous in the late 1930s. It is a case that surrounds a house in London, that was haunted by active Poltergeist phenomena, that actually started in 1938.
Fast foward about 30 years to the 1970s at the same house...
And a family is being tormented by Poltergeist phenomena that started on August night in 1972.
This was the beginning of a chain of events that lasted nearly 4 years.