This bonus cache for the LXXV series is not at the posted co-ordinates to return to the car park retrace your steps back along the road but you could continue along the road instead which will take you towards some other caches not by this CO. The walk is along a quiet country road but there is occasionally traffic.
Other caches are - 'Up a level' GC4V855, 'On the edge' GC11E11 & 'Barbara's Cache' GC2GFCR.
These will take you back towards the car park; So, please answer the following if you have the ABCD numbers.
If not just remember 'Pi' and take a wild guess.
The cache is at: N51 07. (D-B) (D+C+A) (B-B) E001 03. (D-A) (B+D) (A+B+C).
Having retrieved the cache continue along the road for a further 250m to gain access to the field for the other caches. At the time of submitting this cache these three were still OK and no recent DNF's
Enjoy.