*** UPDATE 19/1/25 slightly different hiding place, see revised hint ***
It's hard to imagine that back in 1940 this whole area was an army camp, with dozens of buildings forming Cameron Camp, the base for the 10th Light Anti-Aircraft Battery which provided training for many visiting units during the war, including both US and Canadian troops in the lead up to D-Day. After the war the buildings were used as temporary accommodation for local families until additional council housing was built in St Agnes itself. The camp was demolished in 1971.
The cache is placed on a public footpath that runs from the coast path, through the major area of the camp to Beacon Drive - although you have to look hard to see any remnants of the camp itself.
You are looking for a camo'd bison
The GZ sould be accessible by wheelchairs and strollers if you come in from the access road, but from the coastpath there is a stile. Wheelchair users would need a hand actually retrieving the cache