Perhaps our landlady won't mind...

Land mines.

Yes, I believe that will be the answer to the squirrel problem. You see, the pesky little fellow has indeed decided to build a nest in our eaves. And just now, I looked out the window to see not one, but two little rodent faces, peering up at me with smug, self-satisfied expressions on their pointy little faces.

And I could swear I heard one of them snicker.

I believe a number of strategically places mines should significantly deter any wildlife from staying longer than the time it takes to send their bloody tails sailing through the air...