- Traveling while waiting for a decision. I see the guidance says that you CAN travel while waiting for the decision which will take a few months. They go on to say that once your decision is approved you need to book your ceremony within 3 months. After the ceremony can you travel again as it doesn't sound like it? Does that mean that after the ceremony you need to get the UK passport application in ASAP to get your new UK passport to allow travel?
I can only answer this question.
Your wife is applying under the Nationality law, not the UK’s Immigration law. It's the Immigration law that states that an application will be treated as withdrawn if the applicant travels outside the CTA before a decision has been made; which means any protection under 3C is lost.
She will become a British Citizen when she has sworn her oath at the ceremony. The naturalisation certificate is given at the ceremony. As soon as somebody is granted British Citizenship, their ILR has gone, will never be given back even if citizenship is removed. The British Citizen must return their BRP.
You’ll be fined up to £1,000 if you do not return your permit within 5 working days.https://www.gov.uk/apply-citizenship-indefinite-leave-to-remain/after-you-get-your-certificate If she then travels without a British Citizen passport and can get to the UK border on her foreign passport, they likely won't be happy and you will have a wait while they can verify that she hold a valid British Citizenship, but they will let a citizen in.
However, although at present the UK has a long list of non-visa national countries, where their citizens can ask at the UK border for permission to enter and therefore the airlines and ports will allow these to board for travel to the UK; and the US is on the list; that will end this year. The ETA was announced last year. (although planned before).
https://talk.uk-yankee.com/index.php?topic=100713.0The latest update on the ETA
https://www.gov.uk/guidance/immigration-rules/immigration-rules-appendix-electronic-travel-authorisationWhen the US is added to the ETA list this year, how will she get on a plane without a British Citizen passport? A British citizen cannot have a visa and I would assume that would have to mean an ETA too as the link states those refused an ETA must apply for a visa if they want to enter the UK.