Hi Womble,
Any photo's please OH does better if he has a pic to go by.
OK, took a few snaps this morning. They didn't come out very well, but they should at least give the general idea.
The trap is basically a wooden frame, covered in sheep netting. There is also chicken wire around the end where the bait is, to stop foxy from sticking his paws in and triggering the mechanism from the outside.
The fox enters through a hinged door, which when triggered, falls under its own weight, and is then held closed by a standard door latch. This is the door in a partially closed position, just to show how it works.
And here is the trigger mechanism. The copper pipe fits just underneath the door catch, to hold the door open. This pipe extends right to the back of the trap, where it curves down towards the floor, and has the bait attached (visible in pic 1). When the fox grabs (or even nuzzles) the bait, the door is released, and locks closed.
So, like I say, since we haven't actually caught our fox yet, this is not yet proven technology. However, to our knowledge, he's not actually been back for the past three weeks, and it's quite possible one of the local farmers has dealt with him already!
Hope that's helpful!
Womble.