This finishes a neat little 'square' of caches out in the fields between Willian and Gravely. It is a reasonable walk from all of the possible parking places, but the tracks are good and fairly dry throughout the year. In the winter, with a northerly wind, it can be very exposed and cold, while in the summer it is a very pleasant walking area and great for kids on bikes, dogs off leads (no animals) and parents with buggies.
You are looking for a 35mm film pot. Tuck it back where you find it so that it is not visible.