Park your car where you can in Challock; there are plenty of places to park. Allow yourself a couple of hours to walk this series. When you are ready make your way to the published co ordinates for this cache.
This cache is NOT at the published co ordinates. At the co ordinates you will find a memorial to those who died in the two World Wars. To locate the cache solve the puzzle below. If your solution is correct you'll see you've got quite a way to walk. I'm sorry about that, but I don't think I'm giving any spoilers by saying the reason is becaus of proximity issues with other nearby caches.
You are at a monument to those local people who fell in conflict. One side of the monument is devoted to those who died in 1914 - 1918, the other side to those who died in another conflict. Let those years be ABCD - EFGH
The cache is at
North: HE AC C(A+E) (B-A)
East: (E-A)(F-G-H) H (A+E) (C+G) C (H+C)
From this cache cross the stile and folllow the footpath to the right across the field towards the woods