A short offset multi which will take you to an item of historical interest, which you can read about at the location.
The cache is a short walk away, and can be found at N55 13.Y W002 10.Z
At the published coordinates, please identify :
A = the two digit number on the sign which is immediately followed by a three letter abbreviation.
B = The largest number on the gauge.
C = The number of spikes on the left side rail (including the larger corner ones).
D = The number of spikes on the front rail (including the larger corner ones).
E = Half of the number of spikes on the right side rail (including the larger corner ones).
The checksum for A-E is 132.
Using your smartphone's calculator, or, if you're old-school, your brain:
Y = ((B + C) * D) - A
Z = (B * D) + A + E
My thanks to BroonDandTina for providing a replacement cache, in a slightly changed position.
Please deduct 2 from your Northings and 7 from your Westings. Hint, certitude and cache page updated.
I have provided a hint for the final, which is a tupperware box in a camo bag, but you will get further help in certitude.
Please replace the cache out of view.
You can validate your puzzle solution with
certitude.