To get the the cache from a footpath on the A610, go down the steps, follow the path on the left side of the Canal. You will have the option to go left. Go left and then to your left you will see the footpath.
From Hammersmith you follow the footpath and you will have the option to go left to the footpath next to Cromford Canal, straight on or right onto a road. If you go straight on then it will take you to the cache.
The footpath doesn't lead anywhere so you don't need to keep on following it when you find the cache.
This is not like your average cache, I tried to do something different. You can put trackables in the cache but don't put tradable items in there (You will find out why once you find the cache). Make sure you keep all the contents in the cache and keep it well hidden.
Happy Caching!