This is the third cache of Little Duck's Journey, the caches in which are, in order from the suggested parking:
GC3YK3P Heron – Little Duck's Journey
GC3YK7Z Fisherman – Little Duck's Journey
GC3YK8A Swan – Little Duck's Journey
GC3YKG0 Canoeist – Little Duck's Journey
GC3XQ6W Mother Duck - Little Duck's Journey (Series Bonus)
Needless to say, it is not at the above co-ordinates, which are for nowhere of any relevance.
Finishing off the fisherman's bread, Little Duck carried on down the canal until he bumped into a swan. The swan was about to take a nap, and wasn't at all pleased to be pestered by a duckling, but, just to get rid of him, she said . . .
IMPORTANT SAFETY NOTE
The caches in the series were set from the point of view of a small duck. If you are not a duck, you will need to equip yourself with something with duck-like properties, such as a canoe, kayak or other small boat. The caches are NOT accessible from the towpath and if you try you will probably land on your head in the canal.
As always, if you are not completely confident in your ability to access the cache safely, either enlist the help of someone who does know what they're doing, or give up and go to the pub instead. You cache at your own risk. Don't do anything your mother wouldn't do.