It is reported that in 1955, a series of paranormal happenings occurred at flats that were located in a former prisoner of war camp, having been converted to a more appropriate usage following the end of World War 2. 

Three families were said to have experienced the phenomena, which included:

• feelings of apprehension, fright and depression
• tactile phenomena
• inexplicable sounds of rustlings and tapings
• peculiar smells

There was also a large amount of visual phenomenon associated with the haunting.  Several witnesses reported an odd ensemble of apparitions, which included:

• “oddly-white” faces staring at the occupiers
• a grey female form resembling a nun or nurse
• a male figure which was possibly a bishop
• “flitting shapes” out of the corners of their eyes
• a Salvation Army woman
• a blind man tapping his stick
• forms resembling angels

Certainly there seems to be a religious pattern within the sightings.  There is also some possibility that the presence of infrasound would account for the feelings experienced here.

Refs:

Peter Underwood – Ghosts of Wales