Thirty years ago Janet Winter (formally Hodgson), was at the centre of Britain's most famous ghost story The Enfield Poltergeist.
For two years from 1977, the goings-on at 284 Green Street, Enfield, made national headlines as furniture moved of its own accord, fires spontaneously ignited and extinguished themselves and 11-year-old Janet appeared to be possessed by spirits.
Joining Janet, now 46, is Guy Lyon Playfair, a poltergeist expert who was one of the investigators who visited the house and subsequently wrote a book about what he saw called This House Is Haunted; and Deborah Hyde, editor in chief of magazine The Skeptic, to give her alternative explanation of events.