Pi is a humble sort of character with many qualities:
Pi or π is a mathematical constant equal to a circle's circumference divided by its diameter. commonly approximated as 3.14159 or to 3.14
Pi, π or Π may also refer to a Greek letter
Pi was an ancient state during the Zhou dynasty in China
Pi is a chinese surname.
"π", is a song by Kate Bush from her Aerial album
Pi will help you get the true cache co-ordinates from this puzzle.
The cache is hidden at N 165.282849 E 005.010655
For this selection of Stokesby caches, my suggestion is to park at the stathe (free car park) put your boots on and have a wander around the caches and the scenery for an hour or so.