Topic summary
CUKC
Extracted from the Wikipedia article British subject.
Transition to Commonwealth citizenship
British subject/Commonwealth citizen status co-existed with the citizenships of each Commonwealth country. A person born in Australia would be both an Australian citizen and a British subject. British subjects under the previous meaning who held that status on 1 January 1949 because of a connection with the United Kingdom or a remaining colony became Citizens of the United Kingdom and Colonies (CUKC). CUKC status was the principal form of British nationality during this period of time.