Victorian terraced house, recently moved in. Spotted mouse droppings under kitchen units and in cellar. Call rentokil, bait laid. Rentokil return twice over 6 week period. Bait untouched, no sign if mice anywhere. Rentokil man comes today. Goes to front of building to fix mesh over air brick. Mouse appears suddenly in sitting room!!! Rentokil man catches and kills it. But even he seems baffled!! What's going on??