Some info on my location

Seeing as Ms B told me to plan around my location shots, here's some more info on the place.
The school is called Mount Grace school in potters Bar (it's about 5 minutes away from the station and has bus routes from Enfield).
There are underground tunnels under each building and we could use whichever places we wanted but probably the one I took pictures of is teh nicest, least smelly and safest.

The tunnels themselves are home to a few rats/mice/spiders etc. but I think they add to the thriller-esque mood. Lighting might be an issue, it'd have to be all artificial because only a tiny bit of natural light can get in.

Right now I don't have any ideas that I can write down, but I would like to use this location because not many other people will have access to the same kind of locations. There is also 16 acres of land and a lot of trees that could provide another location to be used if need be