As temperatures climb and sunny days become more frequent in the run-up to summer, many of us will start throwing open our windows and doors to let in some fresh air. The downside, however, is that this can also give insects and spiders an open invitation to make themselves at home. While the UK is fortunately free of any truly dangerous spiders , as even venomous varieties lack fangs strong enough to penetrate human skin. Meanwhile, your average house spider is largely harmless, preferring to