Australia → UK is considerably simpler than the reverse route, but it is not just “vaccinate the pet and book London.”
For Great Britain, the move can involve identification, rabies requirements, the correct travel document, species-specific requirements, Australian certification and an approved transport route.
First distinction: Great Britain and Northern Ireland do not use identical pet-travel frameworks. “UK” is not always specific enough to build the route.
Great Britain Has Its Own Entry System
England, Scotland and Wales use the Great Britain pet-travel framework. Australia is treated as a listed country, but the animal still needs to satisfy the applicable identification, health and documentation conditions.
Dogs can also have an additional treatment requirement that cats do not.
Australia Has a Departure Side Too
The documentation required for British entry needs to work with Australia's official export process. Species-specific Australian certification can also matter.
Your Flight Is Part of Compliance
Great Britain restricts pet entry to approved routes and carriers, and pets arriving by plane are generally transported as cargo except for specified exceptions.
So a perfectly convenient passenger flight can still be useless for the pet. (https://www.gov.uk/bring-pet-to-great-britain/travel-routes-pets?)
This route isn't necessarily difficult because of one huge requirement. It's annoying because government documents, species rules, Australian export certification and the carrier all need to agree before you book around them.
Want the Entire Australia → UK Process Organized for You?
Petbound's Australia → UK Complete Pet Relocation System organizes the GB/NI decision, veterinary requirements, documentation, Australian export preparation, approved transport, timelines, failure points and final checks.
View the Australia → UK Complete Pet Relocation System →
Petbound is a DIY planning resource. Verify current British, Australian and carrier requirements before acting.