The cache is not at the posted co-ordinates.
You can assume N 52° 02 and W000° 46
You just need to find a way of getting the coordinates from the information supplied.
The final location is accessible from the redway path. Do not attempt to access it from the main road!
Congratulations to CASH & Gary, and The Fair Bears on the joint FTF. (And a close second for Skinny49)
UPDATED 6 June 2025 The original final location is now too overgrown to get to, so I have replaced the container in a better place. The puzzle has therefore changed so if you visited the page before this date, you'll need to start again I'm afraid. (If you stored the old location, message me with details and I may help :) )