Can dual national Brits travel to UK without valid British passport after all?
Dual nationals without a valid UK passport may be allowed entry using expired UK passports, with limitations and exceptions for those who've never held one.
Want to Visit Europe Soon? You May Need to Apply for New Travel Authorization | KQED
ETIAS and ETA travel authorizations require specific application steps and timelines for processing. Applications can be denied based on security or health risks.