I searched Cornwall, and further afield, to find a suitable place to hide this cache, eventually I found a perfect spot.
Unfortunately I seem to have lost the coordinates, all I can find is these notes - perhaps you can work out where I hid the cache.
N 50 14.910 W 5 14.022
N 55 51.444 W 4 21.133
N 51 32.841 E 0 26.797
N 52 11.838 E 0 57.506
N 50 24.941 W 4 45.690
N 53 05.589 W 1 55.638
N 53 22.107 W 0 14.468
N 50 07.519 W 5 28.613
N 50 35.944 W 4 30.556
N 50 15.813 W 5 06.885
N 52 46.331 W 0 17.427
N 50 36.598 W 4 26.751
N 50 32.333 W 4 31.120
You can validate your puzzle solution with certitude.