Nope, don't have to microchip either. Mine are all chipped though. Pups are too young to be chipped at 8 weeks in my opinion anyway. I tattoo mine at 6 weeks. Anyone in the UK can breed any dog to any other dog and don't have to register them in any way whatsoever. Loads of mongrels - oops sorry, designer dogs - being bred and sold for twice the price of pure breds.
If you breed properly it doesn't make any money, or at best forced saving. My bitch will be on premium food and weekly vet checks from about 4 weeks, worming regime for her and pups, vitamins etc, pups will be individually certified by the vet if any are bobtailed, disposable whelping box to be used once only,registration with the KC, tattooing, call out rate with the vet if anything goes wrong, etc etc I'm only doing it to better the breed and let my friend have a brood bitch to carry on the dual working and show lines. I might keep a pup if there is one I like. My new owners all get a year's membership of the Breed Club, a lead and a toy for the pups, sample food bag fro three days, a photo of the mountain they are named after, and an illustrated and signed 6 generation pedigree