30 years ago I was naive and bought a BC out of the paper, it was in a barn on its own, no food or water and I felt really sorry for it, needless to say I bought it home. It was flea infested and full of worms.
Having learnt from experience, I would go to a reputable breeder, and not just an accredited breeder from the kennel club, one that comes recommended, and asks you questions about your home environment etc. Crufts is not too long away, and a large part of one of the halls is dedicated to stands with breeders and their dogs for most of the KC registered breeds. Well worth a visit if you are looking for a new puppy.
http://www.crufts.org.uk/