The visa policy of the United Kingdom is the policy by which Her Majesty's Government determines who may and may not enter the country of the United Kingdom, and the Crown dependencies of Guernsey, Jersey, and Isle of Man. Visitors must obtain a visa unless they are exempt.
The UK is a member of the European Union, but it has an opt-out from the Schengen border-free area. It operates its own visa policy and also maintains the Common Travel Area with the Republic of Ireland, the Channel Islands and the Isle of Man.
British Overseas Territories generally apply their own similar but legally distinct visa policies.
The following individuals can enter the United Kingdom, the Channel Islands and the Isle of Man without a visa:
British Nationals who are not European Union citizens and citizens of 56 countries and territories are visa-exempt for stays in the UK of up to 6 months (or 3 months if they enter from the Republic of Ireland):
Unknown: Andorra, Brazil, Guatemala, Vatican; EU: Germany, Latvia, Lithuania
Antigua and Barbuda, Australian, Bahamian, Barbadian, Belizean, Botswana, Bruneian, Canadian, Cypriot, Dominica, East Timorese, Grenadian, Irish, Hong Kong, Kiribati, Malaysian, Maltese, Marshallese, Micronesian, Namibian, New Zealand, Nauruan, Palauan, Saint Kitts and Nevis, Saint Lucian, Saint Vincent and the Grenadines, Samoan, Seychellois, Singaporean, Solomon Islands, Tongan, Trinidad and Tobago, Tuvaluan and Vanuatuan citizens have never needed a visa to gain access to the United Kingdom