So, got a guy in to cut back neighbours out-of-control ivy on our side and he tells me we have a rat run from under our shed through to under next door's decking. Part of it is visible under a loose paving slab at the side of the shed. I've never seen rats but am not surprised.
He suggested poison in the run, but never having had to do this before, I'm not sure what's most effective. Any suggestions?