We were out walking in the area, specifically on a mission to find Subarite's Hanging Lands Gully cache nearby, and decided to pop a couple of new ones out. At this spot there are views across the industrial side of Thatcham.
You are looking for a round black canister which contains a logbook, pencil, small items for trading. Please do not remove anything, other than travel bugs, from the cache without replacing it with something of equal or higher value.