This is the bonus cache for the Bovey Bimble Adventure Lab.
The cache is not hidden at the posted co-ordinates.
In order to find the position of this cache you will need to complete the Bovey Bimble Adventure Lab.
Each completed stage will give you a number for one of the letters used in the formula below
Solve the formula to obtain the co-ordinates for the hide.
N50 (A+B) D.(D-A) (E-A) (D-B) W003 C(D-C-A).B E (E-C)