Grandad is going to have his own loop. The first part is from near Harmer Green to Tewin village along a foot path and bridleway. The second part starts on the other side off the village ,also on paths, and returns after number 16 back to the village.
For all caches you will need your own pencil and possibly tweezers.
You are looking for a small black screw top container and it is accessible from the footpath.