We've used rat poison in the past but it seems it's no longer effective (possibly not being eaten). My mum says that the pest control guy from the council says that this is normal but it costs £10 for this guy to come out and put down some of his special (irresistable?) poison. Is it not possible to get "special council poison" from somewhere else, because this seems like quite an espensive way to get it. The stuff we used previously was £10 per kilo from B&Q.