This cache is located on a public footpath outside of the Wentworth Estate. Interesting history that not many people are aware of.
Wentworth Golf Club Forgotten & Hidden WW2 tunnel Complex for D-Day Landings
With the outbreak of World War II, Wentworth Estate was selected as an alternative seat of government and a rural command post, offering fewer security problems and more resources than the London Cabinet War Rooms. It is from here that the British government would have operated had it been forced to flee London during the blitzkrieg. Many of the large houses were requisitioned; the golf courses were changed so that enemy planes could not land there; and nearby Virginia Water Lake was drained to prevent its use as a navigation landmark by enemy pilots. A subterranean bunker and tunnel system, now sealed and covered by car parks, was built near the Clubhouse. It consisted of two 25-ft diameter parallel tunnels made from cast iron London Underground tube segments with a 12-ft diameter service tunnel running between them. For more information......
https://www.youtube.com/watch?v=Z1A71shPypI