Not at the above coordinates, which are for a pub.
When the going gets tough ...
A bit of digging and delving should enable you to assign numbers to each of the following caches.
A: GCDD90
B: GCYYW8
C: GCA523
D: GCGT09
The coordinates you need are:
N 51 11.V
W 000 39.0W, where
V = (A * B) * (A + C + D) + C * (C + D)
W = C * (A + B) - D
Pnpur: Frr TrbPurpx
Chmmyr: Va pnfr bs nzovthvgl, gnxr gur ynetre ahzore