
Don't do it. Your brothers bitch may as well not ahve any registration as there is no verifiable record of ancestry kept by this organisation, you may as well print your own registrations.
Labradors are the most overbred breed in this country so inless you are breeding for the benefit of the breed. The pair should be outstanding workers and should at the very least be hip scored and eye tested under the BVA/KC schemes for screening against inherited disease.
There are many hundreds of even quite wel bred labrador pups going through resuce each year.
I sugest you read the first post under breeding on this forum and this link should give some food for thought too
http://st15.startlogic.com/~justonel/breeder.html