To get n is a quick drive by.
To work out final co-ords use encrypted clue to find out what n= then do the sums. S37 nn.[n+2][n-1][n+2] E175 [n-3][n+1].[n-3][n+5][n+2]
Once you have your final co-ords worked out you will have to park in the car park that you will find by going under the bridge then walk a short distance between 2 big wooden walls all newly built. If any one needs to go to the loo a musical public toilet is very nearby.