Some pet passports become invalid today due to new EU travel rules.
Anyone travelling to one of the bloc's member states with dogs, cats and ferrets will now need to get an animal health certificate before they set off.
It will need to be issued by a vet within 10 days of their trip, and a new one will be needed for every future journey from Britain into the EU.
It can, however, be used for up to six months for onwards travel within the EU and for re-entering Britain.
A message on the UK government website states: "If you live in England, Scotland or Wales, from 22 April you cannot use a pet passport (even if it was issued in the EU).
"If you use a pet passport, your pet may be refused entry into the EU."
The rules also apply to assistance dogs.
Read more from Sky News:
Children subjected to strip searches
Championship clubs reject VAR system
Other new rules include a limit of five pets in a single private vehicle and for owners to provide written permission for their animal to travel with someone else.
EU pet passports are now only being issued to people whose main base is in the EU and not to seasonal visitors or holiday home owners.
The government said they would still be accepted for British-based travellers returning home.
(c) Sky News 2026: Pet owners warned of new EU travel rules
Children subjected to 'intrusive and traumatic' strip searches
Hay fever sufferers have it worse today than in 1990s - here's why
Facial recognition to be 'rolled out' across UK after human rights challenge fails
How Leicester City went from Premier League champions to the third tier in a decade
EFL clubs reject VAR system
Everyone born after 2008 to be banned from smoking
Two UK ticket-holders each win £41.8m share of EuroMillions jackpot
Ofcom investigating alleged sharing of child sexual abuse material on Telegram
