
You are quite right in looking for a reputable breeder as sadly the Labrador is the most exploited breed of all and currently the fashionable colour is chocolate and the vast majority are not bred but the breeders with the breeds best interests at heart.
Please contact the breed clubs at the end of the breed standard here:
http://www.thekennelclub.org.uk/item/109 Many of the best breeders have not signed up to the Kennel Club accredited breeder scheme as they have done all and more than the scheme requires for many years.
Barbara and the Grey Curly Tails.