Recently we have had them in the roof - rats, that is. A tell-tale hole by the front door points to the fact that, once they are under a new-build house, they can climb up through the cavity walls and occupy the attics. I have been woken in the night by scratching, scuttling and gnawing sounds. Hoped it was only mice for quite a long time but now we have got the pest control man in and he confirms our housemates are indeed rats. Poison has been put in strategic places and we