As of early 2024, Kenya transitioned to a visa-free regime, replacing traditional visas with an Electronic Travel Authorization (eTA). However, for UK citizens simply transiting through a Kenyan airport without leaving the international transit area, no eTA or transit visa is required. If you intend to leave the airport (for example, to stay at a hotel during a long layover), you must apply for a standard eTA via the official "eCitizen" portal at least 72 hours before travel. The eTA process is entirely digital and requires a valid passport, flight itinerary, and a small processing fee. It is important to note that even if you are just passing through, your passport must be valid for at least six months beyond your arrival date. In 2026, the Kenyan government continues to emphasize that the eTA is a mandatory security pre-screening for all visitors entering the country, so travelers should double-check their connection details to ensure they do not inadvertently cross the immigration border without the proper authorization.