See #1 for details of series.
This is a simple off set multi. Stand at the posted co ordinates by the bridge. On a post across the road is a yellow sticker. Make the first digit A & the second digit B. Count the vertical green railings in one section of the bridge. Make this C.
The cache can be found at:- N52 39.B(C-A+B)(A+B) E001 13.(C-A)(C-A)B