Out of curiosity Mitzib, did you eventually find this building? What remains of the hospital is now in the middle of a residential estate on St Johns Wood Blvd, Mt Claremont. Having not been there since the redevelopement took place, I cannot say how "active" it is, although my cousin and I used to go there alot between it's closing in the late 80's and site being fenced off prior to restoration/redevelopement in the early 90's.
On more than one occasion, lights were seen in windows and screams could be heard coming from the rear building, which now borders the college grounds. Not having ever been inside, this could be put down to people using the building as a shelter. Whether haunted or not, it is worth going to look at simply for the historical and architectural value of the building and remaining grounds
