Yep, there potential there for sure, i missed a chunk of it that was closed when i first started exploring but has since been converted. Still plenty of old building left tho. Norwich is one of those place actually, had its exploring heyday just a few years too early for me..
I hear when they were sold to Unilever, the maintenance department was all stripped and outsourced. A lot of historical stuff was thrown out or burnt, so I dont hold much hope for finding anything like that, but would be great to have a look! Their old Wincarnis works site has supposedly got a lot of cellars and tunnels where they used to store the wines.