This over grown Nuclear Bunker is at Pattingham near Wolverhampton, unlike Shenstone it’s been left to nature and the vandals. It was also open , the hatches on these are usually locked, welded or like Shenstone concreted shut.
Now these hatches weren’t airtight , the various vents and pipes were for measuring equipment that was fitted when the posts were in use. Fallout measurement was the main thing , windspeed, air temperature as well. Blast and point of impact were measured from meters fitted to the round pipe that is seen on all these posts, it had a round device on top with holes that recorded the flash of a nuclear bomb.
The posts ran on batteries and were connected to all the others and HQ by BT lines so they could call in the fall out and point of impact. The Royal Corps of Observers that manned these were all unpaid volunteers and would wear Nuclear/Biological/Chemical warfare suits (NBC) , they had rations and water in there for a few weeks. of course what happened then is anyones guess.
This one as I said was open so I took my life in my hands and went down and explored …………….