One breeder to avoid is Raffles / Humphries Poos (run by the same family - Wetton), as many believe them to be a puppy farm.
It's difficult with designer breeds like Cockapoos, Goldendoodles, etc., because high demand for them has led to large-scale breeding of them (therefore unethical).
Things to look for in a good breeder are:
- Only breeding from dogs that have been cleared of genetic diseases (to reduce the risk of the puppies developing serious hereditary conditions - this isn't the same as a "puppy check", which should be done anyway, separately)
- Not breeding from the same mother more than once a year, or too young (Google to find out the recommended ages for Poodles and Cocker Spaniels)
- Not breeding 5+ different dog breeds.
- Raising the puppies in a home environment, acclimatising them with kids, household noises, etc. (Ask what socialisation process they follow.)
- They will not usually let you just place a deposit to pick which colour you want. (They will want to know all about your lifestyle, experience, and try to match you with a pup that has a suitable temperament.)
- Kennel Club Assured (not just registered). Though mixed breeds like Cockapoos can't be registered with the Kennel Club.
Although you won't find Kennel Club registered Cockapoos, you might find KC breeders of Cocker Spaniels or Poodles who also breed mixes. It's unlikely, but it may happen. It's worth looking some up through Champdogs.co.uk or the Kennel Club website.
It's also worth trying to join Cockapoo groups on Facebook and asking for recommendations there - though obviously do your own research from there. Also, Cockapoo rescue groups sometimes have puppies and sometimes adopt out to people with younger kids. (Some Spaniel rescue groups also have Cockapoos, etc.).
You can run the breeder's name through Google with words like "reviews" "puppy farm" etc., as well as look on Trust Pilot. My mom bought a Cockapoo from Raffles and didn't do a single bit of research first. Just liked their website and saw good reviews on their Facebook page.
Finally, you could consider a mini Poodle! I walk a few who look just like Cockapoos, as they get a "teddy bear" cut. They're also low shedding / hypoallergenic. Useful info on that here - twitter.com/mxddiemoo/status/1266845785980887042
These resources might also help:
www.britishcockapoosociety.com/looking-for-a-breeder.html
www.dogsforgood.org/good-advice/how-to-spot-a-puppy-farm
www.thekennelclub.org.uk/getting-a-dog/are-you-ready/finding-a-good-breeder/avoiding-puppy-farmers-and-irresponsible-breeders/
www.pdsa.org.uk/pet-help-and-advice/looking-after-your-pet/puppies-dogs/could-you-spot-a-puppy-farm
Good luck! Getting a puppy is exciting!