Do not bother going to the posted coordinates, the cache is not there: but its a good parking place.
This is a bonus cache. In order to work out the coordinates you must first complete the adventure lab 'The Hermitage of Braid'.
Each of the five stages of the adventure lab provides a clue on submission of a correct answer.
You will find the cache at
N55 55.ABC W003 11.DEA
Good luck!