British African-Caribbean people are an ethnic group in the United Kingdom. They are British citizens whose ancestry originates from the Caribbean or they are nationals of the Caribbean who reside in the UK. There are some self-identified Afro-Caribbean people who are multi-racial. The most common and traditional use of the term African-Caribbean community is in reference to groups of residents continuing aspects of Caribbean culture, customs and traditions in the UK. The earliest generations of Afro-Caribbean people to migrate to Britain trace their ancestry to a wide range of Afro Caribbean ethnic groups. African Caribbean people descend from disparate groups of African peoples who were brought, sold and taken from West Africa as slaves to the colonial Caribbean. In addition, British African Caribbeans may have ancestry from various indigenous Caribbean tribes, and from settlers of European and Asian ethnic groups. According to the National Library of Medicine, the average African Caribbean person has on average 20% European Admixture. Arriving in small numbers to reside in port cities in England and Wales since the mid-18th century, the most significant wave of migration came after World War II, coinciding with the decolonisation era and the dissolution of the British Empire. Known as the Windrush generation, they had arrived as citizens of United Kingdom and Colonies (CUKCs) in the 1950s and 1960s owing to birth in the former British colonies of the Caribbean. Although those who settled in the UK prior to 1973 were granted either right of abode or indefinite leave to remain by the Immigration Act 1971, a series of governmental policies had caused some to be erroneously labelled as unlawfully residing in the UK in the 2000s and 2010s, which subsequently became known as the Windrush scandal. The population has a diverse background, with origins in Jamaica, Trinidad and Tobago, Saint Kitts and Nevis, Barbados, Grenada, Antigua and Barbuda, Saint Lucia, Dominica, Montserrat, British Virgin Islands, Turks and Caicos Islands, Cayman Islands, Anguilla, Saint Vincent and the Grenadines, Guyana, and Belize.