There's the boiler control room which would be unmanned as its sat in the middle of the totally derelict boiler house. If the one at Wilton is anything to go by it's probably quite interesting in itself. I think there's probably a few great details left to see, I'm imagining vast Babcock plates on those boilers...
Demps that was your tripod, I was still halfway up the stairs and I have a photo of the exact moment to prove it somewhere!