INFORMATION:

Fighter dispersal No.15, unlike the wartime pens I have seen, these three have reinforced concrete walls and a concrete Y type dispersal roadway.
Inset : through the middle of this wall is a hole for a re-fueling hose The picture below it are of concrete blocks set onto the foundations with a wire loop, there are four equidistant along the outside of the wall. I have no idea what they were for???? maybe holdfast's for cables/rope to hold a camouflage net between the two walls???