Starting from April 2, 2025, citizens of all EU countries, including Bulgaria, will be required to obtain an electronic transit and short-term residence permit to travel to the United Kingdom , even though they currently do not need a visa for short stays. This electronic travel authorization ( ETA ) must be obtained in advance for trips up to six months for tourism, business, or private visits. The ETA will remain valid for two years or until the expiration of the passport, whichever comes