servman: Time for this one to go... Judging by the log book there have been a lot more visitors that I initally thought.
I had trouble finding it in all the under-growth. I eventually found it by poking it with a stick and hearing the hollow metallic echo. I looked for a good 30 minutes (in a 5m radius) before finding it; I now remember why I don't cache in my bike shorts usually (lots of stinging nettles!).
Thanks to all who visited.
Servman