No! ...I came across several of these set-ups and they were all sprung in the same manner.
I'm no trap expert but I worked out for myself that the hazel was placed in the entrance to encourage the rats to take the correct route.
Ditch,...Lots of greasy rat runs all around the area of the traps. The bait box was a simple set-up, hole in and hole out with the bait to one side of a piece of 1/2 x 1/2 timber keeping it in place, I will attempt to take a pic' soon..
Forgot to mention!...No, there was no access to the tunnel from the top, the Fen traps were placed at one end just insi