Do we really have a problem with a super rats species or is modern lifestyle and human habits exacerbating the problem?

Estimates of the rat population in Britain range from anything between 10.5 to 80 million. Yet experts appear united on one thing: our changing climate will be good news for rats, bringing them closer to humans and in larger numbers than ever before! So how much do we know about them and what can we do to prevent them becoming unwelcome house guests?