Since 1945, immigration to the United Kingdom, controlled by British immigration law and to an extent by British nationality law, has been significant, in particular from the Republic of Ireland and from the former British Empire, especially India, Bangladesh, Pakistan, the Caribbean, South Africa, Nigeria, Ghana, Kenya, and Hong Kong. Since the accession of the UK to the European Communities in the 1970s and the creation of the EU in the early 1990s, immigrants relocated from member states of the European Union, exercising one of the European Union's Four Freedoms. In 2021, since Brexit came into effect, previous EU citizenship's right to newly move to and reside in the UK on a permanent basis does not apply anymore. A smaller number have come as asylum seekers (not included in the defini