UK

United Kingdom is a statutory and geopolitical expression built by Acts of Parliament; it is not a place, it is a body politic; it is imaginary, it does not exist;

premise:
political wording, and formation of the United Kingdom by statute, can only be an abstract legal construction; fiction can not mix with reality, the two can never meet;

Acts forming the name

  • 1800 and 1801 - United Kingdomthe Union with Ireland Act 1800 and Irish Act of Union joined Great Britain and Ireland into one kingdom from 1 January 1801, styled the United Kingdom of Great Britain and Ireland;

United Kingdom

FCDO records the United Kingdom in its list of sovereign countries; FCDO says sovereign means an independent state recognised under international law; OED, state, n. 29.a: the State is the body politic / political organization for civil rule and government, either abstractly or in a particular country; the United Kingdom is a body politic, and as such, is fiction;

FCDO country names list showing GB, United Kingdom, and the official name The United Kingdom of Great Britain and Northern Ireland
FCDO country names list, GB, United Kingdom;

body politic and fiction

FCDO says sovereign means an independent state recognised under international law; OED, state, n. 29.a gives State as the body politic or political organization for civil rule and government, either abstractly or in a particular country; therefore the United Kingdom is a body politic, and as such, fiction;

FCDO excerpt stating that sovereign means independent states recognised under international law
FCDO geographical names index, meaning of sovereign;
Oxford English Dictionary 1933 volume 10 excerpt for state, noun, sense 29
Oxford English Dictionary, 1933, volume X, p. 852, state, n. 29;

result

the name United Kingdom is made by Acts, political description, and interpretation; it is imaginary, it does not exist; UK is not necessarily an abbreviation for United Kingdom; it is an initialism, and the style of an unlimited company formed in England and Wales; it is also imaginary and does not exist;

sources