The co-ordinates take you to the leisure centre information board, this centre as well as a pool has a gym, tennis courts, athletics track, and many other facilities
The phone number on the sign is
ABCDEFGHJKL
The cache is a leisurely stroll away at
N51° D K+L.C*E G F+D+B+L
E000° BH.D+E+J G-B K+H-L
Please replace exactly as found to avoid water ingress.
Congratulations danoblivion FTF