The co-ordinates given above are for a parking location in Kibblesworth. From there follow the path up to the Electricity substation at N54 54.092 W1 37.517. Look for the gate at the entrance to the footpath.(No.1)
Your next stop is N54 54.076 W1 37.720 which is a vertical mosaic that you will pass through. You need the total number of columns that make up the feature. (No.2)
The actual cache is at N54 54.ABC W1 38.DEF
A = (No.2) divided by 20
B = A divided by 2
C = The number of horizontal bars in the gate at location (No.1)
D = (No.2) divided by 8
E = Same as D
F = First digit of (No.2)
The cache is a lunch-box sized plastic container and contains a yoyo, playing cards,nail brush, mirror, CD, Rain Poncho, calculator and a £1 coin for the first finder