Why will the current UK pet passport no longer be valid as of 1 January 2021?
The United Kingdom does not commit to align with the EU’s sanitary acquis and more specifically the rules on pet dogs, cats and ferrets after the end of the transition period, and that it will thus not remain in the EU’s SPS area.
Therefore, for pet dogs, cats and ferrets introduced into the EU and Northern Ireland an animal health certificate will be required (without the requirement for a test for rabies antibody).
This also applies to the UK Crown Dependencies.
More information is available on the Commission’s “readiness notice” on travelling between the EU and the United Kingdom : https://ec.europa.eu/commission/presscorner/#_ftn4