This article shows the images caught on camera and some ideas of who they might be. As Mauro says, I think it is still inconclusive.
http://www.castleofspirits.com/museumghost.htmlMy first proper investigation of a haunting was with Peter Hough (Jenny Randles writing partner) and it was concerning a ghostly image caught on a security camera in a Nightclub in Oldham. This would be about 16 years ago now. The image clearly showed a man in what appeared to be a grandad shirt (collarless) and jeans walking down a corridor and through a door. Conveniently the tape was not available, apparently ITV or the BBC had ruined it whilst trying to format it for broadcast, so we never saw the film itself, just some captured stills. Soon afterwards the figure was linked to someone who was electricuted outside the building in the early-mid 1900s and we interviewed his son.
The videos were supposed to be use and therefore it could not have been an image that bled through from the last time it was used. The whole case was inconclusive.
However one of the doormen also happened to work for my dad in our family business and he finnally admitted to me it was a hoax and done to get some cheap publicity. The image was a bleed over on an unwiped tape and showed someone in jeans and T-shirt.
If ghosts can be caught on security cameras, in this day and age of almost everywhere being covered by CCTV, shouldn't we be getting a lot more of these images? This experience has always left me dubious of CCTV footage, probably unfairly so