Puppies have to be microchipped and are usually at least twelve weeks old before they have the first rabies jab, then the titre tests one month later, and if they have taken, it is then six months before they can travel to the UK from the countries included under the Pet Passport Scheme. If the jab has not taken, they then need to be done again, and wait another month. Other than quarantine (6 months) there is no other way other than importing a bitch in whelp, letting her have the puppies in quarantine, then returning her to her country of origin and the puppies can come out.
For countries not included in the Pet Passport Scheme (see DEFRA website) then quarantine is a must.
Heard on the radio today that they are considering reducing the quarantine period to four months, as they can tell by then whether a dog has contracted rabies.