Lt. der aktuellen Version des Pet Travel Scheme muss die Impfung in Übereinstimmung mit den Herstellerangaben durchgeführt werden (findet sich unter "Booster Vaccinations". Von jährlicher Nachimpfung steht hier nichts, also gilt hier inzwischen auch die 3-Jahresfrist.
Gruss
Joe
Hier der Originaltext von der Seite des Defra:
Booster vaccinations
After an animal has been vaccinated, it must be given booster vaccinations to remain qualified for PETS. This must be done by the “Valid until” date on the animal’s EU pet passport, third country veterinary certificate or PETS certificate and recorded in section IV of the passport or third country official veterinary certificate and on the animal’s vaccination record. The revaccination interval for cats may be different to that for dogs (refer to the vaccine manufacturer’s data sheet). Read the microchip before revaccination. Booster vaccinations are valid for entry to the UK and other EU countries from the date given provided they are given on time (according to the instructions in the vaccine manufacturer’s data sheet where the previous vaccination was given).