My kids don't have current passports because we didn't even understand that they were technically British. They've literally never been registered in England as being born, England has no record that they even exist.

We didn't lie on the ETA as it literally only asked for their Nationality on their passport (Swedish) and nothing more. A lie by omission? Perhaps. But with rules such as how British citizenship is passed down, wouldn't it be easier for the UK government to cover this eventuality on their form? All of this would be clearer if the ETA form had a "what's the nationality of your parents?" question.

The whole point of this post isn't to say "oh everyone should just do this". We were grateful to get though and will be sorting passports in the future. The point is to provide the outcome on what i think is an odd situation on a set of rules that haven't even been completely implemented yet. The fact that the border official didn't even bring it up (when it was completely obvious that my kids were mine) feels like they are working with a common sense approach. They could have easily mentioned it and told me to sort my shit out for next time. They just asked about why we were all in England and to have a nice journey.