NotSpaghetti
nana the link is the parents.
That's it.
Previously, an Australian child could just fly to the UK as a tourist. Now, they need an ETA to board the plane.
The Problem: When you apply for an ETA for the child, the Home Office system checks the parent's details
If the system sees the parent is a British citizen, it may flag that the child is potentially a British citizen by descent.
The Denied Entry: British citizens are legally ineligible for an ETA. If the system decides the child is British, it will refuse the ETA. Without an ETA, the airline will not let the child board the plane on an Australian passport.
If they somehow get on the plane and arrive at a manual passport desk the border officer will see "Place of Birth: Australia" but will be trained to notice the child is traveling with a British parent.
Under the Immigration Act 1971, the "burden of proof" is on the traveler.
In the past: They would probably be let in "with a warning".
In 2026: They may be delayed for hours while their status is verified.
The shared data came from the 1946 UKUSA Agreement to data share for international safety. It developed into Five Eyes
The "Migration 5" is a subset of the alliance that shares biometric data (fingerprints and facial scans) and immigration history. As of February 2026, this sharing has shifted from "manual requests" (where an officer had to choose to look you up) to automated, real-time matching for everyone.
Previously, an Australian child could just fly to the UK as a tourist. Now, they need an ETA to board the plane.
^The Problem: When you apply for an ETA for the child, the Home Office system checks the parent's details^
If the system sees the parent is a British citizen, it may flag that the child is potentially a British citizen by descent.
^The Denied Entry: British citizens are legally ineligible for an ETA. If the system decides the child is British, it will refuse the ETA. Without an ETA, the airline will not let the child board the plane on an Australian passport^
But, even if the parent could apply for British citizenship for their child(ren) does not mean they should not not be denied entry, surely?
They are not British citizens until the parent applies for such and has to provide documentation and go through the process.
At one time only the child of a British father could apply then they included descent from the mother too.
But until application is made and granted, they are not British citizens.
This is why people are confused and some are angry - it's unclear.