Given the task definition and input, reply with output. In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

According to the United Kingdom Border Agency, a person who is not a British citizen, a Commonwealth citizen with the right of abode in the UK, or a national of an EU or EFTA state, requires leave to enter the United Kingdom.

when does a person need leave to enter the uk