Pigeon guano is unsightly, smelly and potentially harmful to health. Give a pigeon an inch and scores will take a mile. A flock of the birds found their way in to the loft of a terraced house in Wood Green, North London, and made themselves at home. Covering the rafters with several inches of pigeon poo. Our technicians, wearing specialist PPE, cleared the pigeon droppings and blocked up all access points into the loft, preventing further contamination.