Here's the information I've got from the russian site "Go to the UK" (it's in Russian, so I will try to translate it correctly):
Pet Travel Scheme (PETS) allows cats and dogs import to the UK from Russia without quarantine of 6 month in case if the following formalities were respected:
* Pet should be chiped for identification. Standard chip should satisfy the requirements of ISO 11784 or ISO 11785 (addendum A).
Chip should be tested out until and after the implantation.
* Pet should be vaccinated of rabies vaccine after the chiping procedure. All information about the rabies vaccination should be shown in the vet certificate: age of the pet, chip number, vaccination date, name of the vaccine's producer, lot number of the vaccine, next vaccination date.
* Pet should be treated against intestinal worms and all kind of parasites.
* Pet should pass the blood test for rabies antibodies in the EC certified Laboratory in 30 days after the vaccination.
* Pet could be imported to the UK only after 6 months after the successful results of the above mentioned blood test.
* Pet should be treated against mites and warms (Echinococcus multilocularis) by the praziquantel in 48 hours before the journey
* Pet could be imported to the UK only by the licensed carrier - British Airways World Cargo only in baggage and cargo space, separately of the owner.