Yes, that's the place. If this had been inner city it would have been fenced off completely, but the hospital was built on the edge of a small village in the middle of the countryside and backs onto farmland. The front driveway is open as some of the buildings have already been put to new use, and once parked up, we could walk at will into the derelict parts to the rear.
I ran into the estate manager right after arriving, and he wanted to know what we were doing there. I carefully explained how, as architectural photographers, we were only interested in the exteriors. He was amused, I think, and pointed out the buildings of interest and what used to go on in them. He also advised against going inside ...