UK Travel Alert 2025: Essential Safety Tips for US Travelers Visiting Britain - Terrorism Warnings and Entry Requirements Explained

As of April 28, 2025, travelers to the United Kingdom should exercise increased caution due to terrorism concerns. Terrorist groups continue plotting possible attacks in the UK, potentially targeting tourist locations, transportation hubs, shopping areas, government facilities, hotels, restaurants, places of worship, and other public spaces with little to no warning.

For US citizens planning to visit the UK, be aware that since January 8, 2025, you must obtain an Electronic Travel Authorization (ETA) before departure if you don't possess a valid UK visa. This requirement applies to US and Canadian citizens as well as many non-European passport holders. This measure is essential to avoid issues with flight boarding or entry into the country.

The UK government maintains strict entry rules, and recent months have seen increased immigration enforcement. Since March 20, 2025, the UK has issued new travel advice for its own citizens traveling to the US, warning about strict enforcement of immigration rules there, which suggests heightened scrutiny across borders internationally.

When traveling in the UK, remember they drive on the left side of the road. Public transportation is widely available and accessible throughout the country. For emergencies, dial 999, or 112 if in Gibraltar.

Medical care is generally widely available in the UK, though in smaller cities it may take longer for medical help to arrive. Keep your vaccinations up to date as recommended by health authorities.

If you're visiting Northern Ireland, be aware there is a risk of isolated violence by dissident groups, though these are primarily focused on police and military targets.

For safety while traveling, choose official taxis or public transportation, always wear seatbelts, and be cautious when walking by using sidewalks and marked crosswalks. The current travel advisory level for the United Kingdom remains at "Exercise Increased Caution" as of March 25, 2025.