Table of Contents What is the UK Electronic Travel Authorisation (ETA)?Why British Dual Nationals Face Denied Boarding After February 25, 2026Which Documents Prove Your British Citizenship Exemption from UK ETA?Special Cases: British Dual Nationals in Unique SituationsCritical Information for British Expats Living in Spain 🇪🇸Real Case Scenarios: What Could HappenFrequently Asked Questions: British...