To find this cache, you will need to complete the Adventure Lab "Morley: A Village Through Time".
It is recommended that you do the lab caches on foot and in the suggested order. Two of the five locations cannot be driven to, though it is possible to get to Almshouses Lane for #2 by car and walk to the others from there. The total walk is only 2¼ miles. Though it is mainly across fields, you will have to twice cross the very busy A608 and also walk alongside it, so please be careful.
After four of the stages of the Ad Lab, you will be given numbers towards the coordinates of this cache. The fifth stage gives you a hint for the hiding place.
The cache can be found at N52 5A.BCD W001 2E.FGH