UK citizens are required to obtain a visa to enter the United States. The most common visa for tourism is the B-2 Tourist Visa, which allows stays of up to 6 months. Alternatively, travellers may be eligible for the Visa Waiver Program (VWP), permitting stays of up to 90 days for tourism or business purposes. To use the VWP, travellers must apply for authorisation through the Electronic System for Travel Authorisation (ESTA) before departure. Ensure your passport is valid for at least six months beyond your intended departure date from the U.S.

There are no mandatory vaccinations for UK travellers entering the United States. However, it's recommended to be up-to-date with routine immunisations, including measles, mumps, rubella (MMR), and diphtheria-tetanus-pertussis (DTP). Additionally, travellers should consider vaccinations for hepatitis A and typhoid, especially if planning to visit rural areas or stay with local hosts. For the latest travel health guidance and vaccination recommendations tailored to your specific travel plans, consult with a healthcare provider or visit the CDC's Travellers' Health website.