The building was open to us, as my friend (Erin) knows the owner (a doctor) - who is currently refurbishing the building to act as a mental health / specialist hub for people in the area. It is a well positioned, grandoise sort of structure. It has cameras, and we were there with the owner's blessings.

I am too much of a stickler for the rules to go onto property uninvited, as much I would like to, I would feel too uncomfortable and unwelcome (even in the absence of others) to explore a place I wouldn't be welcomed to.