i've visited norwich numerous times, and yes, security is stepping up more and more. It is a great place to photograph during the day, and there are many strange things that happen at night. when walking the tunnels, the floor ahead of us would move as if someone was walking on it, but no one was there. i am planning another visit and was wondering if anyone had access to a map of the tunnels, there used to be one on a message board, but i can no longer find it. it gets pretty confusing down there, so any help would be great. they are planning to build upon it, so the chances of seeing the site are going down everyday.
As far as I know, Norwich has been sold and is going to be turned into some sort of park called Utopia. I saw a little ditty on the news last night, but I didn't catch the whole bit.