We've been hearing scuttling and scratching noises in the loft for the last couple of hours. 
Would it be a bad idea to let our - indoor, neurotic and not massively fierce - cat loose in there? She's itching for it, we think, sitting on the highest bits of furniture staring at the ceiling. Or will we end up with half dead creatures running around the house?
Never had an infestation of any kind so no idea what to do. Any advice appreciated! We're wondering if the rain has something to do with it?