A few years back (late 1980s) I was living in at RAF Scampton. It was well known that the officers' mess staff didn't like to go from the bar down to the cellar alone, there were persistent stories about people having experienced unpleasant and unexplained "events" in that area of the building. The staff at the time didn't like talking about it, possibly as we used to take the mickey. I spoke to one of the barmen and he said some people had felt that there was an unfriendly "presence" in the corridor.
While I was there, one of the Reds pilots (I won't give his name) was station duty officer (in itself an unusual event!). Whilst locking up the mess last thing at night he claimed to have seen an apparition in the ante room. He said it was a figure in WW2 flying kit standing by the fireplace and it faded away to nothing as he watched it.
If he reads this he may care to comment further himself.
Scary ShyT