I am a Nigerian mother residing in the UK with my daughter who is a British citizen. We all have Nigerian passports which are valid for travel however I just discovered her British passport has expired. Will she be allowed to travel with me to Nigeria with her Nigerian passport?
She can travel to Nigeria with a Nigerian passport, but she cannot board a flight to the UK with a Nigerian passport unless she has a visa in it, or a residence permit to accompany it, and she cannot get a visa or a residence permit because she is a British citizen.
Timatic, the database that airlines use to determine whether their passengers' documents are sufficient, actually notes that British citizens may enter the UK with an expired passport, so it's possible that the airline would allow your daughter to board a flight to the UK with a valid Nigerian passport and an expired British passport:
Passengers with a British passport with nationality “British Citizen" are allowed to enter with an expired passport.
However, there could be a policy of the airline that prohibits this, or there could be a law in Nigeria that prohibits it. Even if the airline has a specific policy that explicitly permits it, it's likely for the ground staff at checkin to be unaware of it. After all, accepting expired documents is somewhat counterintuitive. I would not want to risk it if I were her.
If she will be in Nigeria long enough to get a new UK passport while she's there, then she should be fine. Otherwise, she should apply for an expedited passport before she leaves. This costs a bit of money, but it is probably a worthwhile expenditure to avoid having to cancel the trip.
- She could travel with you to Nigeria.
- She could enter back the UK with her expired passport (1, 2), as she is a British citizen, regardless of her passport status.
- However, you may have extra issues with the travel back to the UK, since the air company will want to ensure you will be able to enter the country (as the company would be liable to the passenger and might even get fined).
Getting an expedited passport before departure would be the best solution, and that will also give you peace you will not face issues getting it on Nigeria or facing confused officers on entrance.