a = River in South America.
b = Isle of Mull.
c = Japanese province.
d = School in Somerset.
e = A country.
f = French town.
g = Channel Islands.
h = City in Russia.

S41 11.JKL E174 56.XYZ
Where:
J = a - f X = g
K = b - g Y = h - b - c
L = e + c + d Z = d
Please be discrete in your hunt and re-hide the cache as found as we'd like to keep it safe from muggles. BYOP.
In keeping with the theme of this cache, you are encouraged to undertake some CITO whenever you are out caching. We did when originally placing this cache.
We have had to move this geocache as the original GZ is no longer. Solving the puzzle will provide you a set of coordinates which you will then need to enter into Geocheck to obtain the actual GZ. We have left the puzzle as is so that WENZ Mega attendees don't need to resolve the puzzle but just pop back to Geocheck to obtain the updated coordinates. We will review the puzzle after the Mega and amend where required.
Here's your Geocheck link.