I thought i'd destroyed the pesky things (one with a shovel and the other by trapping it behind a corner unit and coaxing it onto a trap), but alas no. I have just taken the christmas decorations down and found chewed up paper in the decorations box in the loft (put some poison up there) and just checked a bait box and can see where one has eaten the poison. The little b/stards are doing my head in!