I thought that episode was really interesting. If I'm remembering correctly it was actually a mix of a talk one of the scientists gave and presented the findings then a radio interview. I've tried several times to find any more information on the experiment and asked someone I know in Wales to ask around to see if anyone remembers it-I think there is always a chance it was a hoax. If not, then they found something interesting there-the mixture of the electricity & building material emitting "ghostly sounds" shows me that there is something there worth looking into further.