Legality of Cannabis by U.S. Jurisdiction The Kingdom of Britain may refer to: Kingdom of Great Britain (1707–1800) United Kingdom of Great Britain and Ireland (1801–1922) United Kingdom of Great Britain and Northern Ireland (1922–present) See also[edit] Kingdom of Brittany King of the Britons Terminology of the British Isles Monarchy of the United Kingdom Great Britain (disambiguation) Britain (disambiguation) Topics referred to by the same term