Tilstock has been covered before on here but I don't think the report included the battle headquarters.
It's one of the easiest to find and access being in the verge of a road.....and it shows in the rubbish that is dumped there. I've never seen it dry out completely and the water now has patches of used engine oil on it.
General view:
Entrance:
Looking back out:
Main corridor:
Escape hatch (ladder missing):
