GEOCACHING ON NATIONAL TRUST PROPERTY IS AT YOUR OWN RISK.
Also, please note that the National Trust is caring for the specialist habitats and landscape you enjoy on this and other caches on NT property, which is one of the reasons we are glad to be members.
I do not recommend bushwhacking to this one from 7 or 9. Retrace your steps and you will find the path you need. The path does go down (and back up afterwards), so I have rated the terrain higher.
Stage 8 - a sport/hobby puzzle
Seven in a row. The cache is at:
N51 1 JV.PW KK CH W000 1 CM.AV JV AK
Take the lower one if in doubt
Here is a link to the hints pages, which will help you to solve the puzzle, and which you can click on if you get stuck.