This is a crew shelter. Because the gunsite was built immediately pre-war, there were none of these originally. They were hurriedly built outside each gunpit, and surrounded by protective berms, as a result of crews taking casualties from strafing enemy aircraft during the Battle of Britain. Sites built later in the war had at least two of these
inside each pit.
This is no2 gunpit.
These next two shots are of the cable conduits leading from the operations block to each gun. These carried the cables from the predictor and height/rangefinder equipment directly to each gun to enable rapid aiming.
This is the remains of an original instruction in the shelter of n0.3 gun...
And this is a unit badge in the same place...
It appears to be the AA Command badge of an arm firing a bow and arrow upwards, with '455' superimposed on it. This is probably a battery number, as I can't find any reference to an AA regiment of that number.
You can
just see traces of the Dark Earth camouflage scheme on the outside of no.3 gunpit. This is more evidence of the battery's pre-war origin, as there would have been no need for camouflage paint if each pit had been intended to have earth banked against the walls.
