Significant Milestone Celebration Traditional Cache

I've placed this cache as a congratulatory gift to some local cachers in the area, who will be reaching a significant milestone in their Geocaching adventures this morning. The group have decided to do the nearby Cold War Bunker Cache and this one should (if the plan goes as intended) become live whilst they are still congragulating  themselves on a job well done. 

You are looking for a small sized container containing a log book only. Please replace exactly as found. Also, be aware that the road here is quite narrow, so please park considerately. If you do have small children with you please watch them on the road. The cars can come along here quite fast.