There are many ways into these woods. The cache is near the junction of several footpaths, adjacent to the Canada Fields, which were recently sold by the Renishaw Estate and are in the process of being converted into an organic fruit & vegetable farm.
You are looking for a very small container, almost a foot long.
When you find it, please extract and replace the log with care.
** Congratulations to Toshack61 for FTF! **