On a big hill just off the small road leading to the church. The post is located next to some telecoms masts and the hatch is locked on a very free Torlift.
Inside there are lots of items remaining including paperwork and a really cool field telephone of WW2 vintage I think....kinda reminded me of M*A*S*H with the little wind up handle thing
Post locked back up when I left. The Orlit B next door is clean and tidy but empty. The ladder is missing but I got up there anyway
Dome on the vent shaft means it's a master post.