The post had had all of its surface features demolished and likely pushed down the access shaft of the post. however pieces of rubble from the surface features are still visible above ground. anyway the site of the post is heavily overgrown within a large mass of bushes. when entering the bushes if your not put off by the constant hiss of the mass of adders in the area its difficult the see anything much more than a few concrete fence posts from the side of the compound and a number of bits of rubble.
likely part of the ventilation shaft on the access shaft or vent shaft
likely part of the ventilation shaft on the access shaft or vent shaft