Heavy Metal Mystery Cache

This is my first ever cache.  I pass the cache site every weekend on my way to bell ringing.  Three of the bells at the church, including my favourite number 4, will be 300 years old in 2017.

The cache is not at the given co-ordinates.  To find it consider the following table.

                                                                                                             A          B          C

                                                                                                             D          E          F

                                                                                                             G          H          I

                                                                                                             J            K          L

                                                                                                            M          N          O

                                                                                                             P          Q          R

The cache can be found at:      N 51  E H . J J E

                                                      E 000  K P . B H O