shirty demon: I have been monitoring the cache location over the last few weeks.
Unfortunately, the host item (an abandoned dinghy) has been both extensively vandalised and moved from its original position in the woods.
A test container was placed in the boat during early May, but disappeared within a few weeks.
Therefore, I've reluctantly decided that this cache has had its day.
Thank you to all those who solved the puzzle (which was based on wiring colour codes), and to those who visited the cache during its 7 year life.