Last year we had squirrels nesting in our loft. They found the insulation there to their satisfaction and snuggled in to raise 2 broods. NAH cut away the overhanging branches at the side of the house but that was no problem, they scuttled directly up the wall instead. Now I've just seen one going into the top of our chimney - a slight improvement on last year as they're not waking me up at 4 in the morning, but I've visions of them falling down the chimney and taking a liking to our lounge sofa.
Any tips on what we could do to stop them?