The Kennel Club is UKAs accredited to certify me, as an Assured Breeder, against the
requirements of its Assured Breeder Scheme.

You can see the listing here

The Kennel Club is the only organisation accredited by the United Kingdom
Accreditation Service (UKAS) to certify dog breeders, under the Kennel Club Assured
Breeder Scheme. This means that the Kennel Club is recognised as an impartial
and competent inspector by the government’s sole national accreditation body. This
gives the puppy buying public additional confidence that as a Kennel Club Assured
Breeder, I am committed to meeting and maintaining high standards for caring for
the health and welfare of their puppies and breeding bitches, and are the best point
of contact for buying a healthy, happy puppy.