what would the uk be called if it became a republic
Republicanism in the United Kingdom In 1991, Labour MP Tony Benn introduced the Commonwealth of Britain Bill, which called for the transformation of the United Kingdom into a "democratic, federal and secular Commonwealth of Britain", with an elected President.[18] The monarchy would be abolished and replaced by a republic with a written constitution. It was read in Parliament a number of times until his retirement at the 2001 election, but never achieved a second reading.[19] Benn presented an account of his proposal in Common Sense: A New Constitution for Britain.[20]
Wikipedia:Nationality of people from the United Kingdom Under British law, these four countries are an equal union, sharing a common British citizenship. The term "Britain" here means "the United Kingdom of Great Britain and Northern Ireland". A UK passport describes its holder as a "British citizen". According to British nationality law all citizens of the UK have British nationality.[2] This has been so since the Acts of Union 1707,[3] in which, after negotiations for a union treaty ended in July 1706, the acts were ratified by both the parliaments of England and Scotland.[4] "Great Britain" strictly speaking means the island comprising England, Scotland and Wales, and thus does not include Northern Ireland, so it is not the same as "Britain".