The above co-ordinates will take you to the gate of the church. Enter the graveyard and look for a War Grave ( white portland stone) dedicated to Private Thomas Smith.
Note his service number as A B C D. Using this format the final cache can be found at N 53.56. D, (A plus C), (A plus B plus D). W 000, 11, (C plus D), C, (A plus D).
The final location is a short walk away.