Houses are were most reports of hauntings come from, but not all.

Tales of the supernatural can also be centred on places of work with the staff at Tyrone Crystal reporting a mysterious apparition called Isaac on the factory floor 30 years ago.

One night a worker said that he could see a figure that called out to him in the factory.

"I am Isaac. I am Isaac," he shouted before disappearing through a wall.

Initially he stayed silent but the story got round and management heard more and more stories about the mysterious apparition.

Soon other workers were reporting a shadowy figure walking about other parts of the site.

"I sensed there was something up there and I came to the one conclusion," one worker told a BBC reporter in 1979.

"That the place was haunted."