Until 1970, the Memorial stood at the junction of Ash Road and Church Road and in that year it was moved to its present site on Hartley Green.
You are looking for a magnetic cache.
***** PLEASE NOTE IMPORTANT *****
CACHES ARE NOT ALLOWED TO BE PLACED ON ACTUAL MEMORIALS OR WITHIN THE BOUNDARY OF SUCH
AT ALL TIMES PLEASE TREAT LOCATIONS OF MEMORIALS WITH RESPECT