In a large square compound at the end of a line of telegraph poles at the end of a long drive 400 yards north of B511.
LOCKED All surface features remain intact with some flaking of the green paint. The post surface features are set low in the ground. A metal dome on the ventilation shaft indicates this was a master post. Three new hasps have been fitted and the post is securely locked.
Four square gun pits from a WW2 Heavy Anti Aircraft Battery lie in front and to the side of the post.
Opened in 1961 and closed in 1991.