This cache can be found by completing the nearby Adventure Lab Series "Selebertes Cert" either via the Adventure Lab app or by clicking here
The stages of the Adventure Lab can be completed in any order, but a logical starting point would be the cricket pitch from where you would walk via the various stages up to the village sign.
As you work through the Adventure Lab series the co-ordinates for this cache will gradually be revealed in the journal after each stage. It is a five minute stroll from the cricket pitch stage of the Adventure Lab.