This cache has been hidden with the kind permission of The National trust.
in the centre of the park you will find a open space the cache is in one corner you are looking for a micro container it has a logbook and a pencil in it at the time of placing enjoy
Nellie is a Land Excavating Trenching Tank otherwise known as White Rabbit No. 6 or Cultivator No. 6. This machine was an underground tank developed in 1939-1940 and designed to travel across no-man's land in a trench of its own making.