
Hi, I have seen this written befoire. The kennel club do not have registered breeders, only a register of dogs, with which breeders register. Anyone who has KC registered bitch mated to a KC registered dog can register the offspring with the KC (so long as there are no endorsements preventing registration).
The local Authority is in charge of registering Commercial breeders. These will be anyone that breeds five or more litters in any one year, or anyone they consider to be breeding for a business.
M9ost reputable breeders breed as part of their hobby of showing or working their dogs, and unless involved as a family with a number of breeds would certainly breed fewer than five litters a year. These persons are not required to be registered, as breeding in this case is a hobby.