Since Brexit, pet passports that were originally issued in Great Britain are no longer recognised by the EU as valid for travel from Great Britain into the EU. All pets arriving into the EU from Great Britain must be issued with an animal health certificate.
You will need to ask your vet if they can issue the animal health certificate, since it needs to be signed by an ‘official veterinarian’.
An animal health certificate will be valid after the date of issue for 10 days for entry into the EU or Northern Ireland, and for four months for onward travel within the EU, and for four months to allow re-entry back into Great Britain. If you have a dog, you will also need to understand the rules on tapeworm treatment and re-entering Great Britain.
Always check the latest government advice before you plan your trip, since rules and regulations are subject to change. Remember that if you’re travelling with your pets outside of the EU, different rules apply.
Don’t forget to check that your own travel plans and documents comply with any regulations for travel within Europe, as you may need to apply for a visa or an international driving permit.