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A very busy spot – if you park near the co-ordinates you have 20 minutes!!
At the co-ordinates you should be able to find 4 numbers very quickly by looking for the red postbox.
Note its number which is at the bottom of its white plate - it is "B w x y z" where x - z are individual numbers.
A = z
B = z - w
C = z - x
D = x + y
E = w - 3y
F = w - x - y
The final co-ordinates are
N 52 degrees 24 . A B C
W 001 degrees 47. D E F
Check digits for the MISSING numbers are:-
North adds up to 17 & West totals 15
The cache is a metal nano on the opposite side of the road from the postbox, in a nice safe hidey-hole. Bring the usual “special equipment” and be careful with the stow. The cache is now around one foot above the ground.
Y U Cbfg
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Coordinates are in the WGS84 datum