As this is a puzzle cache the final cache is not at the published co-ordinates but a handy parking place is.
The cache can be found at N 51° 41.3A+2(C+D)-E W 000° 21.B^2+E^2+C+2E
You can check your answers for this puzzle on GeoChecker.com.
You are looking for a tupperware container hidden within a natural item.
This is the fourth cache placed in a planned series within this ancient woodland common.
Many wildlife species and woodland walks can be enjoyed throughout the common which is very popular with dog walkers and horse riders. More information about the common's history and wildlife can be found here The common can get very muddy so please ensure you are wearing suitable clothing and footwear.