The headline co-ordinates are the start of the path, walk up into the woods and follow the bees eastwards to their hive. The first bee is on the back of the tree just up the root 'steps' from the playground. 
There is a bee roughly every 50 paces on trees, over head height. It is like a night cache with bees instead of markers. If any have fallen off please put them into the final cache. As you get the end of the trail they may spread out a little bit more, just follow the footpath.
Follow the trail until you find a tree with a single bee in a tear on the tree. There is a picture of this bee and it is just before a footpath sign that you will see on your left.
Find somewhere to park in Sandford, I would recommend the right hand side of Somerville Rd, you can then walk just up to Winnowing End, up the steps at the end, through the park to the trail-head.