This cache has information under the lid that you will need to copy down if you are going to attempt Day of the Trifid's - GC23B12
After the original plaque at WP2 going missing, I have gathered information from another at the same location and used this to re-work the equations, so please enjoy this short stroll again and hopefully this one won't go missing.
At or near the posted coordinates you will find something with an inlaid sandstone piece, and on this (but not on the sandstone piece itself) you will find two dates. We will call these A BC DEFG & HI J KLMN.
Calculate WP2 as S 35 GC.(H+B) (I-N) (J) E 149 M(B+D+G).(N-G) (J) (H+G).
At or near WP 2 you will find a plaque for R .G.LOWE. There is a date in this and call it OP QR STUV.
Calculate GZ as S 35 BQ.(R+D) (E-T) (D+B) E 149 P(D+B+G).(R+S) (R+S+V) (H+K+R)
There is no need to climb any fences to access GZ.
** FTF honours go to CrazyCatMan**