UK law professor Elspeth Guild
"For travellers embarking on a trip to the UK next week who had British parents but no visible link to the UK, she had some words of comfort.
"Unless the place of birth stated on the passport indicates that the person may have birthright citizenship somewhere else, it is virtually impossible without a detailed investigation to know whether someone is a dual national. This is particularly so where citizenship was acquired through ancestry rather than place of birth."
I'm really regretting applying for the kids UK passports now, they are very much likely not going to arrive in time and the kids will miss Easter with all their UK family
Probably should have just ran the risk and have us enter with Australian passports and let the partner use her UK passport on another flight!