The walk now goes off along a byway or Green Lane. A byway in the United Kingdom is a track, often rural, which is too minor to be called a road. These routes are often unsurfaced, typically having the appearance of 'green lanes'. Despite this, it is legal (but may not be physically possible) to drive any type of vehicle along certain byways, the same as any ordinary tarmac road.
This could be done as a cache and dash, but this route is really recommended as a walking circuit.
You are looking for a small screw top camo pot.. Once you have replaced the cache, follow the byway.