Not:
http://www.pets4homes.co.uk
www.oodle.co.uk
www.oodle.co.uk
pets.uk.freeads.net
www.preloved.co.uk
www.breedersonline.co.uk
www.gumtree.co.uk
www.k9puppy.co.uk
www.puppies.co.uk
Sorry!
Already Tried These!
For England BTW 
There are NO sites that you can trust to buy a dog from – 99.9% of sites that sell dogs are Puppy Mills.
If you want a Bichon, then find a reputable responsible breeder in your area – You can start with the Breeder Referrals on the Bichon Frise Club of America site http://www.bichon.org/
Edit – Here's the same kind of club for the UK http://www.bichonfriseclubofgb.info/
Tags: Bichon Frise, bichon frise club, bichon frise club of america
There are NO sites that you can trust to buy a dog from – 99.9% of sites that sell dogs are Puppy Mills.
If you want a Bichon, then find a reputable responsible breeder in your area – You can start with the Breeder Referrals on the Bichon Frise Club of America site http://www.bichon.org/
Edit – Here's the same kind of club for the UK http://www.bichonfriseclubofgb.info/
References :
NO reputable breeder would sell dogs online. Contact the local breed club, or consider rescuing a Bichon from a breed rescue or http://www.petfinder.com
References :
Never Never Ever buy a dog online. You need to see the parents and the place the pups are being kept. this will save you a lot of heartache.
References :
Any site that sells dogs is NOT trustworthy!
Your best bet is to get a referral to a reputable breeder from the breed club.. I searched for the Club in GB.. Im assuming that is where you are from the links you posted…
http://www.bichonfriseclubofgb.info/
References :
http://www.bichonfrise.org/clubs.html
Theres a list of clubs, NEVER buy a pup online, because anyone who sells online is more than likely to be a puppy miller.
Instead visit one of the clubs in the link, and find a reputable breeder through the club.
References :
WWW. poopy in a bag.com
References :
Never buy a dog from a breeder that sells puppies online! You never know what's in store. Try searching petfinder.com for a list of your local shelters that have bichon frise. Also, never get a dog from a pet store. Please take this advice. Or if you want a bichon frise from a responsible breeder go on http://www.akc.org, find their number and see if they can find you some local breeders in your area or a breeder not to far from you. Good luck and I wish you the best with your new puppy(:
References :