The Kennel Club doesn't allow bitches to breed more than once a year, if they're on the Assured Breeder Scheme - presumably because this is better for the dog's health. This would certainly be a point to question in show types, so I assume it is in workers too. I don't know much about working dogs, so perhaps that is normal, but it does sound like a bit of a puppy farm to me, albeit a well-run one. Maybe this is normal in the working world - hopefully one of the working owners can step in.
One other thing to bear in mind is that dogs with FTCH (field trial champions) in the pedigrees are likely to be far more serious workers and therefore not make suitable pets than dogs without, as these traits have been bred into those dogs - it sounds as if they are as different as show types and workers. I'd check the pedigrees carefully to see if the dogs are suitable for your use (ie. working dog vs. pet). It might be worth having a read of this thread, and the linked article:
http://www.cockersonline.co.uk/discuss/index.php?topic=98639.0