Who needs a visa for travel from the US to the UK?

Answer 1

A passport is required. A visa is not required for tourist or student stays of up to six months in the United Kingdom (UK) or to enter Gibraltar. Those planning to stay in the UK for any purpose longer than six months must obtain a visa prior to entering. Students enrolled in a course of study that is longer than six months must obtain a visa prior to entering. Those required to obtain a visa, and fail to do so may be denied entry and returned to their port of origin. As of February 1, 2005, foreign visitors who wish to marry in the UK must obtain a visa as a fiancé/e or marriage visitor prior to entering, or obtain a UK Home Office certificate of approval. The marriage visa requirement applies even to persons who do not intend to remain in the UK after their marriage. Visitors wishing to remain longer than one month in Gibraltar should regularize their stay with Gibraltar immigration authorities.

Answer 2

It's entirely dependent on your country of origin and purpose for visit, regardless of country of origin or residence status in a country other than your own determined by the passport or passports you hold. The following website is set up so in the form of an interactive questionnaire. http://www.ukvisas.gov.uk/servlet/Front?pagename=OpenMarket/Xcelerate/ShowPage&c=Page&cid=1006977149962

The official UK visa web sight is: http://www.ukvisas.gov.uk/servlet/Front?pagename=OpenMarket/Xcelerate/ShowPage&c=Page&cid=1006977149953

There's a list of countries requiring a visa at: http://www.languagecourse.net/visa/england.php3