History
Far from a modern novelty, an Anglo-American federal republic has deep roots among statesmen, writers and industrialists.
1877
The “Confession of Faith”
Rhodes advocated the “ultimate recovery of the United States of America as an integral part of the British Empire.” Later Victorian thinkers reversed the direction: with America’s population and industry surging ahead, any union would logically centre on Washington, not London.
Federal union of the two powers was actively debated in late-Victorian intellectual circles.
1893
The North American Review
The Scottish-American industrialist argued that Britain and the United States were destined to reunite under a federal republican constitution — with Britain giving up its hereditary crown and House of Lords and entering the American Union as states.
“Britain and America shall again be one people.” — A. Carnegie
1939
Federal Union of the Atlantic democracies
The New York Times correspondent proposed a transatlantic federal republic uniting the United States, Britain, Ireland, Canada and the European democracies, with common citizenship, defence, currency and a federal congress modelled on the U.S. Constitution.
The Federal Union movement attracted wide support on both sides of the Atlantic before the Second World War.
1960s
Downing Street recollection
A former Downing Street press secretary recalled Harold Wilson discussing with Lyndon Johnson the idea of Britain becoming the 51st state.
No formal study followed.
Ireland established its republic between 1916 and 1949 and has no Crown to abolish. Under this framework it would enter not as a British territory but as an independent republic choosing statehood alongside Northern Ireland — turning the partition border into an ordinary state line within one federal union.
Constitutional roadmap
One possible sequence of legal steps. Every stage requires democratic or legislative consent.
Phase 1 of 5
The UK Parliament and the Oireachtas pass referendum acts. In Britain, voters decide whether to abolish the Crown and whether England, Scotland, Wales and Northern Ireland should seek admission to the United States.
Legal basis
UK parliamentary sovereignty; UN Charter Article 1(2) on self-determination.